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author | Linus Torvalds | 2011-05-23 21:33:02 +0200 |
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committer | Linus Torvalds | 2011-05-23 21:33:02 +0200 |
commit | c44dead70a841d90ddc01968012f323c33217c9e (patch) | |
tree | 85489ebe9b9a3413cd8ee197ffb40c8aa8d97e63 /drivers/usb/gadget/f_mass_storage.c | |
parent | Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/greg... (diff) | |
parent | USB: EHCI: Remove SPARC_LEON {read,write}_be definitions from ehci.h (diff) | |
download | kernel-qcow2-linux-c44dead70a841d90ddc01968012f323c33217c9e.tar.gz kernel-qcow2-linux-c44dead70a841d90ddc01968012f323c33217c9e.tar.xz kernel-qcow2-linux-c44dead70a841d90ddc01968012f323c33217c9e.zip |
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (205 commits)
USB: EHCI: Remove SPARC_LEON {read,write}_be definitions from ehci.h
USB: UHCI: Support big endian GRUSBHC HC
sparc: add {read,write}*_be routines
USB: UHCI: Add support for big endian descriptors
USB: UHCI: Use ACCESS_ONCE rather than using a full compiler barrier
USB: UHCI: Add support for big endian mmio
usb-storage: Correct adjust_quirks to include latest flags
usb/isp1760: Fix possible unlink problems
usb/isp1760: Move function isp1760_endpoint_disable() within file.
USB: remove remaining usages of hcd->state from usbcore and fix regression
usb: musb: ux500: add configuration and build options for ux500 dma
usb: musb: ux500: add dma glue layer for ux500
usb: musb: ux500: add dma name for ux500
usb: musb: ux500: add ux500 specific code for gadget side
usb: musb: fix compile error
usb-storage: fix up the unusual_realtek device list
USB: gadget: f_audio: Fix invalid dereference of initdata
EHCI: don't rescan interrupt QHs needlessly
OHCI: fix regression caused by nVidia shutdown workaround
USB: OTG: msm: Free VCCCX regulator even if we can't set the voltage
...
Diffstat (limited to 'drivers/usb/gadget/f_mass_storage.c')
-rw-r--r-- | drivers/usb/gadget/f_mass_storage.c | 68 |
1 files changed, 23 insertions, 45 deletions
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index 6d8e533949eb..efb58f9f5aa9 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -347,6 +347,7 @@ struct fsg_operations { /* Data shared by all the FSG instances. */ struct fsg_common { struct usb_gadget *gadget; + struct usb_composite_dev *cdev; struct fsg_dev *fsg, *new_fsg; wait_queue_head_t fsg_wait; @@ -613,6 +614,11 @@ static int fsg_setup(struct usb_function *f, if (!fsg_is_set(fsg->common)) return -EOPNOTSUPP; + ++fsg->common->ep0_req_tag; /* Record arrival of a new request */ + req->context = NULL; + req->length = 0; + dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); + switch (ctrl->bRequest) { case USB_BULK_RESET_REQUEST: @@ -1584,37 +1590,6 @@ static int wedge_bulk_in_endpoint(struct fsg_dev *fsg) return rc; } -static int pad_with_zeros(struct fsg_dev *fsg) -{ - struct fsg_buffhd *bh = fsg->common->next_buffhd_to_fill; - u32 nkeep = bh->inreq->length; - u32 nsend; - int rc; - - bh->state = BUF_STATE_EMPTY; /* For the first iteration */ - fsg->common->usb_amount_left = nkeep + fsg->common->residue; - while (fsg->common->usb_amount_left > 0) { - - /* Wait for the next buffer to be free */ - while (bh->state != BUF_STATE_EMPTY) { - rc = sleep_thread(fsg->common); - if (rc) - return rc; - } - - nsend = min(fsg->common->usb_amount_left, FSG_BUFLEN); - memset(bh->buf + nkeep, 0, nsend - nkeep); - bh->inreq->length = nsend; - bh->inreq->zero = 0; - start_transfer(fsg, fsg->bulk_in, bh->inreq, - &bh->inreq_busy, &bh->state); - bh = fsg->common->next_buffhd_to_fill = bh->next; - fsg->common->usb_amount_left -= nsend; - nkeep = 0; - } - return 0; -} - static int throw_away_data(struct fsg_common *common) { struct fsg_buffhd *bh; @@ -1702,6 +1677,10 @@ static int finish_reply(struct fsg_common *common) if (common->data_size == 0) { /* Nothing to send */ + /* Don't know what to do if common->fsg is NULL */ + } else if (!fsg_is_set(common)) { + rc = -EIO; + /* If there's no residue, simply send the last buffer */ } else if (common->residue == 0) { bh->inreq->zero = 0; @@ -1710,24 +1689,19 @@ static int finish_reply(struct fsg_common *common) common->next_buffhd_to_fill = bh->next; /* - * For Bulk-only, if we're allowed to stall then send the - * short packet and halt the bulk-in endpoint. If we can't - * stall, pad out the remaining data with 0's. + * For Bulk-only, mark the end of the data with a short + * packet. If we are allowed to stall, halt the bulk-in + * endpoint. (Note: This violates the Bulk-Only Transport + * specification, which requires us to pad the data if we + * don't halt the endpoint. Presumably nobody will mind.) */ - } else if (common->can_stall) { + } else { bh->inreq->zero = 1; if (!start_in_transfer(common, bh)) - /* Don't know what to do if - * common->fsg is NULL */ rc = -EIO; common->next_buffhd_to_fill = bh->next; - if (common->fsg) + if (common->can_stall) rc = halt_bulk_in_endpoint(common->fsg); - } else if (fsg_is_set(common)) { - rc = pad_with_zeros(common->fsg); - } else { - /* Don't know what to do if common->fsg is NULL */ - rc = -EIO; } break; @@ -1910,7 +1884,7 @@ static int check_command(struct fsg_common *common, int cmnd_size, common->lun, lun); /* Check the LUN */ - if (common->lun >= 0 && common->lun < common->nluns) { + if (common->lun < common->nluns) { curlun = &common->luns[common->lun]; common->curlun = curlun; if (common->cmnd[0] != REQUEST_SENSE) { @@ -2468,7 +2442,7 @@ static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) struct fsg_dev *fsg = fsg_from_func(f); fsg->common->new_fsg = fsg; raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); - return 0; + return USB_GADGET_DELAYED_STATUS; } static void fsg_disable(struct usb_function *f) @@ -2604,6 +2578,8 @@ static void handle_exception(struct fsg_common *common) case FSG_STATE_CONFIG_CHANGE: do_set_interface(common, common->new_fsg); + if (common->new_fsg) + usb_composite_setup_continue(common->cdev); break; case FSG_STATE_EXIT: @@ -2774,6 +2750,7 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common, common->gadget = gadget; common->ep0 = gadget->ep0; common->ep0req = cdev->req; + common->cdev = cdev; /* Maybe allocate device-global string IDs, and patch descriptors */ if (fsg_strings[FSG_STRING_INTERFACE].id == 0) { @@ -2800,6 +2777,7 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common, for (i = 0, lcfg = cfg->luns; i < nluns; ++i, ++curlun, ++lcfg) { curlun->cdrom = !!lcfg->cdrom; curlun->ro = lcfg->cdrom || lcfg->ro; + curlun->initially_ro = curlun->ro; curlun->removable = lcfg->removable; curlun->dev.release = fsg_lun_release; curlun->dev.parent = &gadget->dev; |