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| * ALSA: pcm: Preprocess PAUSED or SUSPENDED stream before PREPARETakashi Iwai2017-06-141-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | Calling PREPARE ioctl to the stream in either PAUSED or SUSPENDED state may confuse some drivers that don't handle the state properly. Instead of fixing each driver, PCM core should take care of the proper state change before actually trying to (re-)prepare the stream. Namely, when the stream is in PAUSED state, it triggers PAUSE_RELEASE, and when in SUSPENDED state, it triggers STOP, before calling prepare callbacks. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Allow dropping stream directly after resumeTakashi Iwai2017-06-141-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | So far, the PCM core refuses DROP ioctl when the stream in the suspended state. This was basically to avoid the invalid state change *during* the suspend. But since we protect the power change globally in the common PCM ioctl caller side, it's guaranteed that snd_pcm_drop() is called at the right power state. So we can assume that the drop of stream is safe immediately after SUSPENDED state. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Apply power lock globally to common ioctlsTakashi Iwai2017-06-141-37/+19Star
| | | | | | | | | | | | | | | | | | | | | | All PCM common ioctls should run only in the powered up state, but currently only a few ioctls do the proper snd_power_lock() and snd_power_wait() invocations. Instead of adding to each place, do it commonly in the caller side, so that all these ioctls are assured to be operated at the power up state. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Clean up SNDRV_PCM_IOCTL_PAUSE codeTakashi Iwai2017-06-141-7/+3Star
| | | | | | | | | | | | | | | | Use snd_pcm_action_lock_irq() helper instead of open coding. No functional change. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: unify codes to operate application-side position on PCM bufferTakashi Sakamoto2017-06-121-24/+4Star
| | | | | | | | | | | | | | | | | | | | | | In a series of recent work, ALSA PCM core got some arrangements to handle application-side position on PCM buffer. However, relevant codes still disperse to two translation units This commit unifies these codes into a helper function. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: probe events when parameters are changed actuallyTakashi Sakamoto2017-06-111-27/+29
| | | | | | | | | | | | | | | | | | | | At present, trace events are probed even if corresponding parameter is not actually changed. This is inconvenient. This commit improves the behaviour. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: return error immediately for parameters handlingTakashi Sakamoto2017-06-111-28/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When refining mask/interval parameters, helper functions can return error code. This error is not handled immediately. This seems to return parameters to userspace applications in its meddle of processing. However, in general, when receiving error from system calls, the application might not handle argument buffer. It's reasonable to judge the above design as superfluity. This commit handles the error immediately. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add tracepoints for final selection process of hardware parametersTakashi Sakamoto2017-06-091-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Results of ioctl(2) with SNDRV_PCM_IOCTL_HW_REFINE and SNDRV_PCM_IOCTL_HW_PARAMS are different, because the latter has single value for several parameters; e.g. channels of PCM substream. Selection of the single value is done independently of application of constraints. It's helpful for developers to trace the selection process. This commit adds tracepoints to snd_pcm_hw_params_choose() for the purpose. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: localize snd_pcm_hw_params_choose()Takashi Sakamoto2017-06-091-0/+40
| | | | | | | | | | | | | | | | | | | | | | | | As of v4.12, snd_pcm_hw_params_choose() is just called in a process context of ioctl(2) with SNDRV_PCM_IOCTL_HW_PARAMS. The function locates in a different file, which has no tracepoints. This commit moves the function to a file with the tracepoints for later commit. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: move fixup of info flag after selecting single parametersTakashi Sakamoto2017-06-091-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When drivers register no flags about information of PCM hardware, ALSA PCM core fixups it roughly. Currently, this operation places in a function snd_pcm_hw_refine(). It can be moved to a function fixup_unreferenced_params() because it doesn't affects operations between these two functions. This idea is better to bundle codes with similar purposes and this commit achieves it. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: calculate non-mask/non-interval parameters always when possibleTakashi Sakamoto2017-06-091-26/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A structure for parameters of PCM runtime has parameters which are not classified as mask/interval type. They are decided only when corresponding normal parameters have unique values. * struct snd_pcm_hw_params.msbits * struct snd_pcm_hw_params.rate_num * struct snd_pcm_hw_params.rate_den * struct snd_pcm_hw_params.fifo_size Current implementation of hw_params ioctl sometimes doesn't decide these parameters even if corresponding parameters are fixed, because these parameters are evaluated before a call of snd_pcm_hw_params_choose(). This commit adds a helper function to process the parameters and call it in proper positions. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: use helper functions to refer parameters as constantsTakashi Sakamoto2017-06-091-6/+6
| | | | | | | | | | | | | | | | | | | | To fixup some parameters, ALSA PCM core refers the other parameters as constants. There're some macros for this purpose. This commit replaces codes with them. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add comment about application of rule to PCM parametersTakashi Sakamoto2017-06-081-1/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drivers add rules of parameters to runtime of PCM substream, when applications open ALSA PCM character device. When applications call ioctl(2) with SNDRV_PCM_IOCTL_HW_REFINE or SNDRV_PCM_IOCTL_HW_PARAMS, the rules are applied to the parameters and return the result to user space. The rule can have dependency between parameters. Additionally, it can have condition flags about application of rules. Userspace applications can indicate the flags to suppress change of parameters. This commit attempts to describe the mechanism. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: use helper functions to check whether parameters are determinedTakashi Sakamoto2017-06-081-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | A commit 8bea869c5e56 ("ALSA: PCM midlevel: improve fifo_size handling") allows drivers to implement calculation of fifo size in parameter structure. This calculation runs only when two of the other parameters have single value. In ALSA PCM core, there're some helper functions for the case. This commit applies the functions instead of value comparison. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: adaption of code formattingTakashi Sakamoto2017-06-081-6/+6
| | | | | | | | | | | | | | | | | | This commit modifies current for readability in below aspects: - use bool type variable instead of int type variable assigned to 0/1 - move variable definition from loop to top of the function definition Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: remove function local variable with alternative evaluationTakashi Sakamoto2017-06-081-5/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | A local variable is used to judge whether a parameter should be handled due to reverse dependency of the other rules. However, this can be obsoleted by check of a sentinel in dependency array. This commit removes the local variable and check the sentinel to reduce stack usage. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: use goto statement instead of while statement to reduce indentationTakashi Sakamoto2017-06-081-42/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | In a process to calculate parameters of PCM substream, application of all rules is iterated several times till parameter dependencies are satisfied. In current implementation, two loops are used for the design, however this brings two-level indentation and decline readability. This commit attempts to reduce the indentation by using goto statement, instead of outer while loop. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add a helper function to apply parameter rulesTakashi Sakamoto2017-06-081-32/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | Application of rules to parameters of PCM substream is done in a call of snd_pcm_hw_refine(), while the function includes much codes and is not enough friendly to readers. This commit splits the codes to a separated function so that readers can get it easily. I leave desicion into compilers to merge the function into its callee. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add a helper function to constrain interval-type parametersTakashi Sakamoto2017-06-081-19/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | Application of constraints to interval-type parameters for PCM substream is done in a call of snd_pcm_hw_refine(), while the function includes much codes and is not enough friendly to readers. This commit splits the codes to a separated function so that readers can get it easily. I leave desicion into compilers to merge the function into its callee. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add a helper function to constrain mask-type parametersTakashi Sakamoto2017-06-081-19/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | Application of constraints to mask-type parameters for PCM substream is done in a call of snd_pcm_hw_refine(), while the function includes much codes and is not enough friendly to readers. This commit splits the codes to a separated function so that readers can get it easily. I leave desicion into compilers to merge the function into its callee. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: obsolete RULES_DEBUG local macroTakashi Sakamoto2017-06-071-82/+7Star
| | | | | | | | | | | | | | Added tracepoints obsoleted RULES_DEBUG local macro and relevant codes. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: enable parameter tracepoints only when CONFIG_SND_DEBUG is enabledTakashi Sakamoto2017-06-071-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | In a previous commit, tracepoints are added for PCM parameter processing. As long as I know, this implementation increases size of relocatable object by 35%. For vendors who are conscious of memory footprint, it brings apparent disadvantage. This commit utilizes CONFIG_SND_DEBUG configuration to enable/disable the tracepoints. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: tracepoints for refining PCM parametersTakashi Sakamoto2017-06-071-0/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When working for devices which support configurable modes for its data transmission or which consists of several components, developers are likely to use rules of parameters of PCM substream. However, there's no infrastructure to assist their work. In old days, ALSA PCM core got a local 'RULES_DEBUG' macro to debug refinement of parameters for PCM substream. Although this is merely a makeshift. With some modifications, we get the infrastructure. This commit is for the purpose. Refinement of mask/interval type of PCM parameters is probed as tracepoint events as 'hw_mask_param' and 'hw_interval_param' on existent 'snd_pcm' subsystem. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add local header file for snd-pcm moduleTakashi Sakamoto2017-05-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Several files are used to construct PCM core module, a.k.a snd-pcm. Although available APIs are described in 'include/sound/pcm.h', some of them are not exported as symbols in kernel space. Such APIs are just for module local usage. This commit adds module local header file and move some function prototypes into it so that scopes of them are controlled properly and developers get no confusion from unavailable symbols. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Call ack() whenever appl_ptr is updatedTakashi Iwai2017-05-251-9/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Although the ack callback is supposed to be called at each appl_ptr or hw_ptr update, we missed a few opportunities: namely, forward, rewind and sync_ptr. Formerly calling ack at rewind may have leaded to unexpected results due to the forgotten negative appl_ptr update in indirect-PCM helper, which is the major user of the PCM ack callback. But now we fixed this oversights, thus we can call ack callback safely even at rewind callback -- of course with the proper handling of the error from the callback. This patch adds the calls of ack callback in the places mentioned in the above. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Remove set_fs() in PCM core codeTakashi Iwai2017-05-231-39/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PCM core code has a few usages of set_fs(), mostly for two codepaths: - The DELAY ioctl call from pcm_compat.c - The ioctl wrapper in kernel context for PCM OSS and other This patch removes the set_fs() usage in these places by a slight code refactoring. For the former point, snd_pcm_delay() is changed to return the value directly instead of putting the value to the given address. Each caller stores the result in an appropriate manner. For fixing the latter, snd_pcm_lib_kernel_ioctl() is changed to call the functions directly as well. For achieving it, now the function accepts only the limited set of ioctls that have been used, so far. The primary user of this function is the PCM OSS layer, and the only other user is USB UAC1 gadget driver. Both drivers don't need the full set of ioctls. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Simplify forward/rewind codesTakashi Iwai2017-05-211-68/+50Star
| | | | | | | | | | | | | | | | Factor out the common codes in snd_pcm_*_forward() and *_rewind() functions to simplify the codes. No functional changes. Reviewd-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: Use a common helper for PCM state check and hwsyncTakashi Iwai2017-05-211-118/+35Star
| | | | | | | | | | | | | | | | | | | | | | | | | | The mostly same codes for checking the current PCM state and calling hwsync are found in a few places. This patch simplifies them by creating a common helper function. It also fixes a couple of cases where we missed the proper state check (e.g. PAUSED state wasn't handled in rewind and snd_pcm_hwsync()), too. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: use helper function to refer parameter as read-onlyTakashi Sakamoto2017-05-171-1/+2
| | | | | | | | | | | | | | | | | | | | ALSA pcm core has hw_param_interval_c() to pick up parameter with const qualifier for safe programming. This commit applies it to the cases. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: pcm: add const qualifier for read-only table for sampling rateTakashi Sakamoto2017-05-171-2/+4
| | | | | | | | | | | | | | | | | | | | | | There's a read-only table for each sampling rate, while it doesn't have const qualifier and can be modified. This commit add the qualifier. As a result, a symbol for the table moves from .data section to .rodata. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | sched/wait: Rename wait_queue_t => wait_queue_entry_tIngo Molnar2017-06-201-2/+2
|/ | | | | | | | | | | | | | | | | | | | | | Rename: wait_queue_t => wait_queue_entry_t 'wait_queue_t' was always a slight misnomer: its name implies that it's a "queue", but in reality it's a queue *entry*. The 'real' queue is the wait queue head, which had to carry the name. Start sorting this out by renaming it to 'wait_queue_entry_t'. This also allows the real structure name 'struct __wait_queue' to lose its double underscore and become 'struct wait_queue_entry', which is the more canonical nomenclature for such data types. Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* sched/headers: Prepare to move signal wakeup & sigpending methods from ↵Ingo Molnar2017-03-021-0/+1
| | | | | | | | | | | | | <linux/sched.h> into <linux/sched/signal.h> Fix up affected files that include this signal functionality via sched.h. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmfDave Jiang2017-02-251-9/+6Star
| | | | | | | | | | | | | | | | | | | | | | | ->fault(), ->page_mkwrite(), and ->pfn_mkwrite() calls do not need to take a vma and vmf parameter when the vma already resides in vmf. Remove the vma parameter to simplify things. [arnd@arndb.de: fix ARM build] Link: http://lkml.kernel.org/r/20170125223558.1451224-1-arnd@arndb.de Link: http://lkml.kernel.org/r/148521301778.19116.10840599906674778980.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ALSA: pcm: Fix avail to return error if stream is suspendedJeeja KP2016-09-061-1/+3
| | | | | | | | | | | | | | | | | When the stream is in suspended state some applications wait on "Stream Pipe Error" in response to snd_pcm_avail call to resume the stream. In the current implementation snd_pcm_avail() returns zero when the stream is in suspended state. This causes application to enter in infinite loop for frames to be available. "Stream pipe Error" code is getting returned for read/write call when the stream is in suspended state. Similarly update snd_pcm_avail to return -ESTRPIPE. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: Fix poll error return codesCharles Keepax2016-05-091-2/+2
| | | | | | | | | | We can't return a negative error code from the poll callback the return type is unsigned and is checked against the poll specific flags we need to return POLLERR if we encounter an error. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: Fix rwsem deadlock for non-atomic PCM streamTakashi Iwai2016-02-181-2/+14
| | | | | | | | | | | | | | | | | | | | | | | | | A non-atomic PCM stream may take snd_pcm_link_rwsem rw semaphore twice in the same code path, e.g. one in snd_pcm_action_nonatomic() and another in snd_pcm_stream_lock(). Usually this is OK, but when a write lock is issued between these two read locks, the problem happens: the write lock is blocked due to the first reade lock, and the second read lock is also blocked by the write lock. This eventually deadlocks. The reason is the way rwsem manages waiters; it's queued like FIFO, so even if the writer itself doesn't take the lock yet, it blocks all the waiters (including reads) queued after it. As a workaround, in this patch, we replace the standard down_write() with an spinning loop. This is far from optimal, but it's good enough, as the spinning time is supposed to be relatively short for normal PCM operations, and the code paths requiring the write lock aren't called so often. Reported-by: Vinod Koul <vinod.koul@intel.com> Tested-by: Ramesh Babu <ramesh.babu@intel.com> Cc: <stable@vger.kernel.org> # v3.18+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: constify action_ops structuresJulia Lawall2015-11-301-13/+13
| | | | | | | | | | | The action_ops structures are never modified, so declare them as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Tested-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: timer: add config item to export PCM timer disabling for expertJie Yang2015-10-161-20/+16Star
| | | | | | | | | | | | | | | | PCM timer is not always used. For embedded device, we need an interface to disable it when it is not needed, to shrink the kernel size and memory footprint, here add CONFIG_SND_PCM_TIMER for it. When both CONFIG_SND_PCM_TIMER and CONFIG_SND_TIMER is unselected, about 25KB saving bonus we can get. Please be noted that when disabled, those stubs who using pcm timer (e.g. dmix, dsnoop & co) may work incorrectlly. Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: Avoid double hw_free calls at releasing a streamTakashi Iwai2015-09-291-1/+2
| | | | | | | | | | | | snd_pcm_release_substream() always calls hw_free op when the stream was opened. This is superfluous in most cases because it's been already released via explicit hw_free ioctl. Although this double call is usually OK as this callback should be written to be called multiple times, it's better to avoid superfluous calls. Reported-by: Vinod Koul <vinod.koul@intel.com> Tested-by: Jeeja Kp <jeeja.kp@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: core: check for underflow in snd_pcm_sw_params()Dan Carpenter2015-09-241-1/+2
| | | | | | | | As far as I can see, having an invalid ->tstamp_mode is harmless, but adding a check silences a static checker warning. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: Fix lockdep warning with nonatomic PCM opsTakashi Iwai2015-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the nonatomic PCM ops, the system may spew lockdep warnings like: ============================================= [ INFO: possible recursive locking detected ] 4.2.0-rc1-jeejaval3 #12 Not tainted --------------------------------------------- aplay/4029 is trying to acquire lock: (snd_pcm_link_rwsem){.+.+.+}, at: [<ffffffff816fd473>] snd_pcm_stream_lock+0x43/0x60 but task is already holding lock: (snd_pcm_link_rwsem){.+.+.+}, at: [<ffffffff816fcf29>] snd_pcm_action_nonatomic+0x29/0x80 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(snd_pcm_link_rwsem); lock(snd_pcm_link_rwsem); Although this is false-positive as the rwsem is taken always as read-only for these code paths, it's certainly annoying to see this at any occasion. A simple fix is to use down_read_nested() in snd_pcm_stream_lock() that can be called inside another lock. Reported-by: Vinod Koul <vinod.koul@intel.com> Reported-by: Jeeja Kp <jeeja.kp@intel.com> Tested-by: Jeeja Kp <jeeja.kp@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Merge tag 'sound-4.1-rc1' of ↵Linus Torvalds2015-04-161-3/+38
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound updates from Takashi Iwai: "There have been major modernization with the standard bus: in ALSA sequencer core and HD-audio. Also, HD-audio receives the regmap support replacing the in-house cache register cache code. These changes shouldn't impact the existing behavior, but rather refactoring. In addition, HD-audio got the code split to a core library part and the "legacy" driver parts. This is a preliminary work for adapting the upcoming ASoC HD-audio driver, and the whole transition is still work in progress, likely finished in 4.1. Along with them, there are many updates in ASoC area as usual, too: lots of cleanups, Intel code shuffling, etc. Here are some highlights: ALSA core: - PCM: the audio timestamp / wallclock enhancement - PCM: fixes in DPCM management - Fixes / cleanups of user-space control element management - Sequencer: modernization using the standard bus HD-audio: - Modernization using the standard bus - Regmap support - Use standard runtime PM for codec power saving - Widget-path based power-saving for IDT, VIA and Realtek codecs - Reorganized sysfs entries for each codec object - More Dell headset support ASoC: - Move of jack registration to the card level - Lots of ASoC cleanups, mainly moving things from the CODEC level to the card level - Support for DAPM routes specified by both the machine driver and DT - Continuing improvements to rcar - pcm512x enhacements - Intel platforms updates - rt5670 updates / fixes - New platforms / devices: some non-DSP Qualcomm platforms, Google's Storm platform, Maxmim MAX98925 CODECs and the Ingenic JZ4780 SoC Misc: - ice1724: Improved ESI W192M support - emu10k1: Emu 1010 fixes/enhancement" * tag 'sound-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (411 commits) ALSA: hda - set GET bit when adding a vendor verb to the codec regmap ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T450 ALSA: hda - Fix another race in runtime PM refcounting ALSA: hda - Expose codec type sysfs ALSA: ctl: fix to handle several elements added by one operation for userspace element ASoC: Intel: fix array_size.cocci warnings ASoC: n810: Automatically disconnect non-connected pins ASoC: n810: Consistently pass the card DAPM context to n810_ext_control() ASoC: davinci-evm: Use card DAPM context to access widgets ASoC: mop500_ab8500: Use card DAPM context to access widgets ASoC: wm1133-ev1: Use card DAPM context to access widgets ASoC: atmel: Improve machine driver compile test coverage ASoC: atmel: Add dependency to SND_SOC_I2C_AND_SPI where necessary ALSA: control: Fix a typo of SNDRV_CTL_ELEM_ACCESS_TLV_* with SNDRV_CTL_TLV_OP_* ALSA: usb-audio: Don't attempt to get Microsoft Lifecam Cinema sample rate ASoC: rnsd: fix build regression without CONFIG_OF ALSA: emu10k1: add toggles for E-mu 1010 optical ports ALSA: ctl: fill identical information to return value when adding userspace elements ALSA: ctl: fix a bug to return no identical information in info operation for userspace controls ALSA: ctl: confirm to return all identical information in 'activate' event ...
| * Merge tag 'asoc-v4.1' of ↵Takashi Iwai2015-03-061-0/+2
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next ASoC: Changes for v4.1 A selection of changes for v4.1 so far. The main things are: - Move of jack registration to the card where it belongs. - Support for DAPM routes specified by both the machine driver and DT.
| * | ALSA: core: add .get_time_infoPierre-Louis Bossart2015-02-201-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce more generic .get_time_info to retrieve system timestamp and audio timestamp in single routine. Backwards compatibility is preserved with same functionality as with .wall_clock method (to be removed in following commits to avoid breaking git bisect) Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: core: pass audio tstamp config from userspacePierre-Louis Bossart2015-02-201-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let userspace select audio timestamp config when the STATUS_EXT ioctl is used, ignore and zero all other fields No change for the existing STATUS ioctl, parameters are treated as read-only. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | | pcm: another weird API abuseAl Viro2015-04-121-19/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | readv() and writev() should _not_ ignore all but the first ->iov_len, among other things. Really weird abuse of those syscalls - it expects a vector element per channel, with identical lengths (it actually assumes them to be identical - no checking is done). readv() and writev() are really bad match for that. Unfortunately, userland API is userland API and we can't do anything about them. Converted to ->read_iter/->write_iter. Please, _please_ don't do anything of that kind when designing new interfaces. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Merge branch 'iocb' into for-nextAl Viro2015-04-121-1/+1
|\ \ \ | |_|/ |/| |
| * | fs: move struct kiocb to fs.hChristoph Hellwig2015-03-261-1/+1
| |/ | | | | | | | | | | | | | | struct kiocb now is a generic I/O container, so move it to fs.h. Also do a #include diet for aio.h while we're at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* / ALSA: pcm: Don't leave PREPARED state after drainingTakashi Iwai2015-02-231-0/+2
|/ | | | | | | | | | When a PCM draining is performed to an empty stream that has been already in PREPARED state, the current code just ignores and leaves as it is, although the drain is supposed to set all such streams to SETUP state. This patch covers that overlooked case. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcm: allow for trigger_tstamp snapshot in .triggerPierre-Louis Bossart2015-02-091-1/+3
| | | | | | | | | Don't use generic snapshot of trigger_tstamp if low-level driver or hardware can get a more precise value for better audio/system time synchronization. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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