From 225afca60b8a21bb53ca461eef78a60958ff95e4 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:55:28 +0200 Subject: vmw_balloon: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Julien Freche Cc: "VMware, Inc." Cc: Arnd Bergmann Cc: linux-kernel@vger.kernel.org Acked-by: Nadav Amit Signed-off-by: Greg Kroah-Hartman --- drivers/misc/vmw_balloon.c | 19 +++---------------- 1 file changed, 3 insertions(+), 16 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index ad807d5a3141..fdf5ad757226 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -1516,19 +1516,10 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset) DEFINE_SHOW_ATTRIBUTE(vmballoon_debug); -static int __init vmballoon_debugfs_init(struct vmballoon *b) +static void __init vmballoon_debugfs_init(struct vmballoon *b) { - int error; - b->dbg_entry = debugfs_create_file("vmmemctl", S_IRUGO, NULL, b, &vmballoon_debug_fops); - if (IS_ERR(b->dbg_entry)) { - error = PTR_ERR(b->dbg_entry); - pr_err("failed to create debugfs entry, error: %d\n", error); - return error; - } - - return 0; } static void __exit vmballoon_debugfs_exit(struct vmballoon *b) @@ -1541,9 +1532,8 @@ static void __exit vmballoon_debugfs_exit(struct vmballoon *b) #else -static inline int vmballoon_debugfs_init(struct vmballoon *b) +static inline void vmballoon_debugfs_init(struct vmballoon *b) { - return 0; } static inline void vmballoon_debugfs_exit(struct vmballoon *b) @@ -1555,7 +1545,6 @@ static inline void vmballoon_debugfs_exit(struct vmballoon *b) static int __init vmballoon_init(void) { enum vmballoon_page_size_type page_size; - int error; /* * Check if we are running on VMware's hypervisor and bail out @@ -1571,9 +1560,7 @@ static int __init vmballoon_init(void) INIT_DELAYED_WORK(&balloon.dwork, vmballoon_work); - error = vmballoon_debugfs_init(&balloon); - if (error) - return error; + vmballoon_debugfs_init(&balloon); spin_lock_init(&balloon.comm_lock); init_rwsem(&balloon.conf_sem); -- cgit v1.2.3-55-g7522 From 5a2338dbf97fac3a93e2ffefa5ab907ac5a9ba56 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:32:13 +0200 Subject: lkdtm: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Arnd Bergmann Cc: linux-kernel@vger.kernel.org Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- drivers/misc/lkdtm/core.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c index 1972dad966f5..bae3b3763f3e 100644 --- a/drivers/misc/lkdtm/core.c +++ b/drivers/misc/lkdtm/core.c @@ -429,22 +429,13 @@ static int __init lkdtm_module_init(void) /* Register debugfs interface */ lkdtm_debugfs_root = debugfs_create_dir("provoke-crash", NULL); - if (!lkdtm_debugfs_root) { - pr_err("creating root dir failed\n"); - return -ENODEV; - } /* Install debugfs trigger files. */ for (i = 0; i < ARRAY_SIZE(crashpoints); i++) { struct crashpoint *cur = &crashpoints[i]; - struct dentry *de; - de = debugfs_create_file(cur->name, 0644, lkdtm_debugfs_root, - cur, &cur->fops); - if (de == NULL) { - pr_err("could not create crashpoint %s\n", cur->name); - goto out_err; - } + debugfs_create_file(cur->name, 0644, lkdtm_debugfs_root, cur, + &cur->fops); } /* Install crashpoint if one was selected. */ -- cgit v1.2.3-55-g7522 From 909bad2d978737592b70a0546edfa8bd023ab147 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:45:03 +0200 Subject: ti-st: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: linux-kernel@vger.kernel.org Reviewed-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/ti-st/st_kim.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c index e7cfdbd1f66d..93821c11bff9 100644 --- a/drivers/misc/ti-st/st_kim.c +++ b/drivers/misc/ti-st/st_kim.c @@ -761,10 +761,6 @@ static int kim_probe(struct platform_device *pdev) pr_info("sysfs entries created\n"); kim_debugfs_dir = debugfs_create_dir("ti-st", NULL); - if (!kim_debugfs_dir) { - pr_err(" debugfs entries creation failed "); - return 0; - } debugfs_create_file("version", S_IRUGO, kim_debugfs_dir, kim_gdata, &version_fops); -- cgit v1.2.3-55-g7522 From 4a14abc4bbe58aa465f0f5599bf4c612cfeb367f Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 12 Jun 2019 17:54:18 +0200 Subject: cxl: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Because there's no need to check, also make the return value of the local debugfs_create_io_x64() call void, as no one ever did anything with the return value (as they did not need to.) And make the cxl_debugfs_* calls return void as no one was even checking their return value at all. Cc: linuxppc-dev@lists.ozlabs.org Acked-by: Andrew Donnellan Reviewed-by: Frederic Barrat Reviewed-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cxl/cxl.h | 15 ++++++--------- drivers/misc/cxl/debugfs.c | 36 +++++++++++------------------------- 2 files changed, 17 insertions(+), 34 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index a73c9e669d78..5dc0f6093f9d 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -908,11 +908,11 @@ void cxl_update_dedicated_ivtes_psl8(struct cxl_context *ctx); #ifdef CONFIG_DEBUG_FS -int cxl_debugfs_init(void); +void cxl_debugfs_init(void); void cxl_debugfs_exit(void); -int cxl_debugfs_adapter_add(struct cxl *adapter); +void cxl_debugfs_adapter_add(struct cxl *adapter); void cxl_debugfs_adapter_remove(struct cxl *adapter); -int cxl_debugfs_afu_add(struct cxl_afu *afu); +void cxl_debugfs_afu_add(struct cxl_afu *afu); void cxl_debugfs_afu_remove(struct cxl_afu *afu); void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir); void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir); @@ -921,27 +921,24 @@ void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir); #else /* CONFIG_DEBUG_FS */ -static inline int __init cxl_debugfs_init(void) +static inline void __init cxl_debugfs_init(void) { - return 0; } static inline void cxl_debugfs_exit(void) { } -static inline int cxl_debugfs_adapter_add(struct cxl *adapter) +static inline void cxl_debugfs_adapter_add(struct cxl *adapter) { - return 0; } static inline void cxl_debugfs_adapter_remove(struct cxl *adapter) { } -static inline int cxl_debugfs_afu_add(struct cxl_afu *afu) +static inline void cxl_debugfs_afu_add(struct cxl_afu *afu) { - return 0; } static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu) diff --git a/drivers/misc/cxl/debugfs.c b/drivers/misc/cxl/debugfs.c index 1fda22c24c93..7b987bf498b5 100644 --- a/drivers/misc/cxl/debugfs.c +++ b/drivers/misc/cxl/debugfs.c @@ -26,11 +26,11 @@ static int debugfs_io_u64_set(void *data, u64 val) DEFINE_DEBUGFS_ATTRIBUTE(fops_io_x64, debugfs_io_u64_get, debugfs_io_u64_set, "0x%016llx\n"); -static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, - struct dentry *parent, u64 __iomem *value) +static void debugfs_create_io_x64(const char *name, umode_t mode, + struct dentry *parent, u64 __iomem *value) { - return debugfs_create_file_unsafe(name, mode, parent, - (void __force *)value, &fops_io_x64); + debugfs_create_file_unsafe(name, mode, parent, (void __force *)value, + &fops_io_x64); } void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) @@ -54,25 +54,22 @@ void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_TRACE)); } -int cxl_debugfs_adapter_add(struct cxl *adapter) +void cxl_debugfs_adapter_add(struct cxl *adapter) { struct dentry *dir; char buf[32]; if (!cxl_debugfs) - return -ENODEV; + return; snprintf(buf, 32, "card%i", adapter->adapter_num); dir = debugfs_create_dir(buf, cxl_debugfs); - if (IS_ERR(dir)) - return PTR_ERR(dir); adapter->debugfs = dir; debugfs_create_io_x64("err_ivte", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL_ErrIVTE)); if (adapter->native->sl_ops->debugfs_add_adapter_regs) adapter->native->sl_ops->debugfs_add_adapter_regs(adapter, dir); - return 0; } void cxl_debugfs_adapter_remove(struct cxl *adapter) @@ -96,18 +93,16 @@ void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SLICE_TRACE)); } -int cxl_debugfs_afu_add(struct cxl_afu *afu) +void cxl_debugfs_afu_add(struct cxl_afu *afu) { struct dentry *dir; char buf[32]; if (!afu->adapter->debugfs) - return -ENODEV; + return; snprintf(buf, 32, "psl%i.%i", afu->adapter->adapter_num, afu->slice); dir = debugfs_create_dir(buf, afu->adapter->debugfs); - if (IS_ERR(dir)) - return PTR_ERR(dir); afu->debugfs = dir; debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An)); @@ -118,8 +113,6 @@ int cxl_debugfs_afu_add(struct cxl_afu *afu) if (afu->adapter->native->sl_ops->debugfs_add_afu_regs) afu->adapter->native->sl_ops->debugfs_add_afu_regs(afu, dir); - - return 0; } void cxl_debugfs_afu_remove(struct cxl_afu *afu) @@ -127,19 +120,12 @@ void cxl_debugfs_afu_remove(struct cxl_afu *afu) debugfs_remove_recursive(afu->debugfs); } -int __init cxl_debugfs_init(void) +void __init cxl_debugfs_init(void) { - struct dentry *ent; - if (!cpu_has_feature(CPU_FTR_HVMODE)) - return 0; - - ent = debugfs_create_dir("cxl", NULL); - if (IS_ERR(ent)) - return PTR_ERR(ent); - cxl_debugfs = ent; + return; - return 0; + cxl_debugfs = debugfs_create_dir("cxl", NULL); } void cxl_debugfs_exit(void) -- cgit v1.2.3-55-g7522 From 7e9f02a7896bf12bddfa28c4fdc442aa6cc6eda1 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:43:23 +0200 Subject: mic: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Ashutosh Dixit Cc: linux-kernel@vger.kernel.org Reviewed-by: Arnd Bergmann Reviewed-by: Sudeep Dutt Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mic/card/mic_debugfs.c | 18 ++---------------- drivers/misc/mic/cosm/cosm_debugfs.c | 4 ---- drivers/misc/mic/host/mic_debugfs.c | 4 ---- drivers/misc/mic/scif/scif_debugfs.c | 5 ----- drivers/misc/mic/vop/vop_debugfs.c | 4 ---- 5 files changed, 2 insertions(+), 33 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/mic/card/mic_debugfs.c b/drivers/misc/mic/card/mic_debugfs.c index 7a4140874888..fa2b5fefb791 100644 --- a/drivers/misc/mic/card/mic_debugfs.c +++ b/drivers/misc/mic/card/mic_debugfs.c @@ -63,25 +63,13 @@ DEFINE_SHOW_ATTRIBUTE(mic_intr); */ void __init mic_create_card_debug_dir(struct mic_driver *mdrv) { - struct dentry *d; - if (!mic_dbg) return; mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg); - if (!mdrv->dbg_dir) { - dev_err(mdrv->dev, "Cant create dbg_dir %s\n", mdrv->name); - return; - } - - d = debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, - mdrv, &mic_intr_fops); - if (!d) { - dev_err(mdrv->dev, - "Cant create dbg intr_test %s\n", mdrv->name); - return; - } + debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, mdrv, + &mic_intr_fops); } /** @@ -101,8 +89,6 @@ void mic_delete_card_debug_dir(struct mic_driver *mdrv) void __init mic_init_card_debugfs(void) { mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); - if (!mic_dbg) - pr_err("can't create debugfs dir\n"); } /** diff --git a/drivers/misc/mic/cosm/cosm_debugfs.c b/drivers/misc/mic/cosm/cosm_debugfs.c index 71c216d0504d..340ea7171411 100644 --- a/drivers/misc/mic/cosm/cosm_debugfs.c +++ b/drivers/misc/mic/cosm/cosm_debugfs.c @@ -105,8 +105,6 @@ void cosm_create_debug_dir(struct cosm_device *cdev) scnprintf(name, sizeof(name), "mic%d", cdev->index); cdev->dbg_dir = debugfs_create_dir(name, cosm_dbg); - if (!cdev->dbg_dir) - return; debugfs_create_file("log_buf", 0444, cdev->dbg_dir, cdev, &log_buf_fops); @@ -125,8 +123,6 @@ void cosm_delete_debug_dir(struct cosm_device *cdev) void cosm_init_debugfs(void) { cosm_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); - if (!cosm_dbg) - pr_err("can't create debugfs dir\n"); } void cosm_exit_debugfs(void) diff --git a/drivers/misc/mic/host/mic_debugfs.c b/drivers/misc/mic/host/mic_debugfs.c index c6e3c764699f..370f98c7b752 100644 --- a/drivers/misc/mic/host/mic_debugfs.c +++ b/drivers/misc/mic/host/mic_debugfs.c @@ -125,8 +125,6 @@ void mic_create_debug_dir(struct mic_device *mdev) scnprintf(name, sizeof(name), "mic%d", mdev->id); mdev->dbg_dir = debugfs_create_dir(name, mic_dbg); - if (!mdev->dbg_dir) - return; debugfs_create_file("smpt", 0444, mdev->dbg_dir, mdev, &mic_smpt_fops); @@ -155,8 +153,6 @@ void mic_delete_debug_dir(struct mic_device *mdev) void __init mic_init_debugfs(void) { mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); - if (!mic_dbg) - pr_err("can't create debugfs dir\n"); } /** diff --git a/drivers/misc/mic/scif/scif_debugfs.c b/drivers/misc/mic/scif/scif_debugfs.c index a6820480105a..8fe38e7ca6e6 100644 --- a/drivers/misc/mic/scif/scif_debugfs.c +++ b/drivers/misc/mic/scif/scif_debugfs.c @@ -103,11 +103,6 @@ DEFINE_SHOW_ATTRIBUTE(scif_rma); void __init scif_init_debugfs(void) { scif_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL); - if (!scif_dbg) { - dev_err(scif_info.mdev.this_device, - "can't create debugfs dir scif\n"); - return; - } debugfs_create_file("scif_dev", 0444, scif_dbg, NULL, &scif_dev_fops); debugfs_create_file("scif_rma", 0444, scif_dbg, NULL, &scif_rma_fops); diff --git a/drivers/misc/mic/vop/vop_debugfs.c b/drivers/misc/mic/vop/vop_debugfs.c index 2ccef52aca23..d4551d522188 100644 --- a/drivers/misc/mic/vop/vop_debugfs.c +++ b/drivers/misc/mic/vop/vop_debugfs.c @@ -186,10 +186,6 @@ void vop_init_debugfs(struct vop_info *vi) snprintf(name, sizeof(name), "%s%d", KBUILD_MODNAME, vi->vpdev->dnode); vi->dbg = debugfs_create_dir(name, NULL); - if (!vi->dbg) { - pr_err("can't create debugfs dir vop\n"); - return; - } debugfs_create_file("dp", 0444, vi->dbg, vi, &vop_dp_fops); debugfs_create_file("vdev_info", 0444, vi->dbg, vi, &vop_vdev_info_fops); } -- cgit v1.2.3-55-g7522 From d7ef4857d947a0c9ba26bfe02bac1629bda9f9a0 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:41:07 +0200 Subject: genwq: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Frank Haverkamp Cc: linux-kernel@vger.kernel.org Reviewed-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/misc/genwqe/card_base.c | 5 -- drivers/misc/genwqe/card_base.h | 2 +- drivers/misc/genwqe/card_debugfs.c | 165 +++++++------------------------------ drivers/misc/genwqe/card_dev.c | 6 +- 4 files changed, 32 insertions(+), 146 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c index d137d0fab9bf..f9f329651037 100644 --- a/drivers/misc/genwqe/card_base.c +++ b/drivers/misc/genwqe/card_base.c @@ -1377,10 +1377,6 @@ static int __init genwqe_init_module(void) class_genwqe->devnode = genwqe_devnode; debugfs_genwqe = debugfs_create_dir(GENWQE_DEVNAME, NULL); - if (!debugfs_genwqe) { - rc = -ENOMEM; - goto err_out; - } rc = pci_register_driver(&genwqe_driver); if (rc != 0) { @@ -1392,7 +1388,6 @@ static int __init genwqe_init_module(void) err_out0: debugfs_remove(debugfs_genwqe); - err_out: class_destroy(class_genwqe); return rc; } diff --git a/drivers/misc/genwqe/card_base.h b/drivers/misc/genwqe/card_base.h index 77ed3967c5b0..d9e4a6e5fe3c 100644 --- a/drivers/misc/genwqe/card_base.h +++ b/drivers/misc/genwqe/card_base.h @@ -445,7 +445,7 @@ int genwqe_device_create(struct genwqe_dev *cd); int genwqe_device_remove(struct genwqe_dev *cd); /* debugfs */ -int genwqe_init_debugfs(struct genwqe_dev *cd); +void genwqe_init_debugfs(struct genwqe_dev *cd); void genqwe_exit_debugfs(struct genwqe_dev *cd); int genwqe_read_softreset(struct genwqe_dev *cd); diff --git a/drivers/misc/genwqe/card_debugfs.c b/drivers/misc/genwqe/card_debugfs.c index 6f7e39f07811..3e319743e5a3 100644 --- a/drivers/misc/genwqe/card_debugfs.c +++ b/drivers/misc/genwqe/card_debugfs.c @@ -324,11 +324,9 @@ static int info_show(struct seq_file *s, void *unused) DEFINE_SHOW_ATTRIBUTE(info); -int genwqe_init_debugfs(struct genwqe_dev *cd) +void genwqe_init_debugfs(struct genwqe_dev *cd) { struct dentry *root; - struct dentry *file; - int ret; char card_name[64]; char name[64]; unsigned int i; @@ -336,153 +334,50 @@ int genwqe_init_debugfs(struct genwqe_dev *cd) sprintf(card_name, "%s%d_card", GENWQE_DEVNAME, cd->card_idx); root = debugfs_create_dir(card_name, cd->debugfs_genwqe); - if (!root) { - ret = -ENOMEM; - goto err0; - } /* non privileged interfaces are done here */ - file = debugfs_create_file("ddcb_info", S_IRUGO, root, cd, - &ddcb_info_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("info", S_IRUGO, root, cd, - &info_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_x64("err_inject", 0666, root, &cd->err_inject); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_u32("ddcb_software_timeout", 0666, root, - &cd->ddcb_software_timeout); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_u32("kill_timeout", 0666, root, - &cd->kill_timeout); - if (!file) { - ret = -ENOMEM; - goto err1; - } + debugfs_create_file("ddcb_info", S_IRUGO, root, cd, &ddcb_info_fops); + debugfs_create_file("info", S_IRUGO, root, cd, &info_fops); + debugfs_create_x64("err_inject", 0666, root, &cd->err_inject); + debugfs_create_u32("ddcb_software_timeout", 0666, root, + &cd->ddcb_software_timeout); + debugfs_create_u32("kill_timeout", 0666, root, &cd->kill_timeout); /* privileged interfaces follow here */ if (!genwqe_is_privileged(cd)) { cd->debugfs_root = root; - return 0; + return; } - file = debugfs_create_file("curr_regs", S_IRUGO, root, cd, - &curr_regs_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("curr_dbg_uid0", S_IRUGO, root, cd, - &curr_dbg_uid0_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("curr_dbg_uid1", S_IRUGO, root, cd, - &curr_dbg_uid1_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("curr_dbg_uid2", S_IRUGO, root, cd, - &curr_dbg_uid2_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("prev_regs", S_IRUGO, root, cd, - &prev_regs_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("prev_dbg_uid0", S_IRUGO, root, cd, - &prev_dbg_uid0_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("prev_dbg_uid1", S_IRUGO, root, cd, - &prev_dbg_uid1_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("prev_dbg_uid2", S_IRUGO, root, cd, - &prev_dbg_uid2_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } + debugfs_create_file("curr_regs", S_IRUGO, root, cd, &curr_regs_fops); + debugfs_create_file("curr_dbg_uid0", S_IRUGO, root, cd, + &curr_dbg_uid0_fops); + debugfs_create_file("curr_dbg_uid1", S_IRUGO, root, cd, + &curr_dbg_uid1_fops); + debugfs_create_file("curr_dbg_uid2", S_IRUGO, root, cd, + &curr_dbg_uid2_fops); + debugfs_create_file("prev_regs", S_IRUGO, root, cd, &prev_regs_fops); + debugfs_create_file("prev_dbg_uid0", S_IRUGO, root, cd, + &prev_dbg_uid0_fops); + debugfs_create_file("prev_dbg_uid1", S_IRUGO, root, cd, + &prev_dbg_uid1_fops); + debugfs_create_file("prev_dbg_uid2", S_IRUGO, root, cd, + &prev_dbg_uid2_fops); for (i = 0; i < GENWQE_MAX_VFS; i++) { sprintf(name, "vf%u_jobtimeout_msec", i); - - file = debugfs_create_u32(name, 0666, root, - &cd->vf_jobtimeout_msec[i]); - if (!file) { - ret = -ENOMEM; - goto err1; - } + debugfs_create_u32(name, 0666, root, + &cd->vf_jobtimeout_msec[i]); } - file = debugfs_create_file("jobtimer", S_IRUGO, root, cd, - &jtimer_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_file("queue_working_time", S_IRUGO, root, cd, - &queue_working_time_fops); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_u32("skip_recovery", 0666, root, - &cd->skip_recovery); - if (!file) { - ret = -ENOMEM; - goto err1; - } - - file = debugfs_create_u32("use_platform_recovery", 0666, root, - &cd->use_platform_recovery); - if (!file) { - ret = -ENOMEM; - goto err1; - } + debugfs_create_file("jobtimer", S_IRUGO, root, cd, &jtimer_fops); + debugfs_create_file("queue_working_time", S_IRUGO, root, cd, + &queue_working_time_fops); + debugfs_create_u32("skip_recovery", 0666, root, &cd->skip_recovery); + debugfs_create_u32("use_platform_recovery", 0666, root, + &cd->use_platform_recovery); cd->debugfs_root = root; - return 0; -err1: - debugfs_remove_recursive(root); -err0: - return ret; } void genqwe_exit_debugfs(struct genwqe_dev *cd) diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c index 8c1b63a4337b..b5942e8943ef 100644 --- a/drivers/misc/genwqe/card_dev.c +++ b/drivers/misc/genwqe/card_dev.c @@ -1307,14 +1307,10 @@ int genwqe_device_create(struct genwqe_dev *cd) goto err_cdev; } - rc = genwqe_init_debugfs(cd); - if (rc != 0) - goto err_debugfs; + genwqe_init_debugfs(cd); return 0; - err_debugfs: - device_destroy(cd->class_genwqe, cd->devnum_genwqe); err_cdev: cdev_del(&cd->cdev_genwqe); err_add: -- cgit v1.2.3-55-g7522 From 5666d896e838c974c535b3949353c83d68ce4384 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 11 Jun 2019 20:38:16 +0200 Subject: mei: no need to check return value of debugfs_create functions When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Tomas Winkler Cc: Arnd Bergmann Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/debugfs.c | 47 +++++++++++----------------------------------- drivers/misc/mei/main.c | 8 +------- drivers/misc/mei/mei_dev.h | 7 ++----- 3 files changed, 14 insertions(+), 48 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 0970142bcace..df6bf8b81936 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -233,47 +233,22 @@ void mei_dbgfs_deregister(struct mei_device *dev) * * @dev: the mei device structure * @name: the mei device name - * - * Return: 0 on success, <0 on failure. */ -int mei_dbgfs_register(struct mei_device *dev, const char *name) +void mei_dbgfs_register(struct mei_device *dev, const char *name) { - struct dentry *dir, *f; + struct dentry *dir; dir = debugfs_create_dir(name, NULL); - if (!dir) - return -ENOMEM; - dev->dbgfs_dir = dir; - f = debugfs_create_file("meclients", S_IRUSR, dir, - dev, &mei_dbgfs_fops_meclients); - if (!f) { - dev_err(dev->dev, "meclients: registration failed\n"); - goto err; - } - f = debugfs_create_file("active", S_IRUSR, dir, - dev, &mei_dbgfs_fops_active); - if (!f) { - dev_err(dev->dev, "active: registration failed\n"); - goto err; - } - f = debugfs_create_file("devstate", S_IRUSR, dir, - dev, &mei_dbgfs_fops_devstate); - if (!f) { - dev_err(dev->dev, "devstate: registration failed\n"); - goto err; - } - f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir, - &dev->allow_fixed_address, - &mei_dbgfs_fops_allow_fa); - if (!f) { - dev_err(dev->dev, "allow_fixed_address: registration failed\n"); - goto err; - } - return 0; -err: - mei_dbgfs_deregister(dev); - return -ENODEV; + debugfs_create_file("meclients", S_IRUSR, dir, dev, + &mei_dbgfs_fops_meclients); + debugfs_create_file("active", S_IRUSR, dir, dev, + &mei_dbgfs_fops_active); + debugfs_create_file("devstate", S_IRUSR, dir, dev, + &mei_dbgfs_fops_devstate); + debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir, + &dev->allow_fixed_address, + &mei_dbgfs_fops_allow_fa); } diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index ad02097d7fee..f894d1f8a53e 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -984,16 +984,10 @@ int mei_register(struct mei_device *dev, struct device *parent) goto err_dev_create; } - ret = mei_dbgfs_register(dev, dev_name(clsdev)); - if (ret) { - dev_err(clsdev, "cannot register debugfs ret = %d\n", ret); - goto err_dev_dbgfs; - } + mei_dbgfs_register(dev, dev_name(clsdev)); return 0; -err_dev_dbgfs: - device_destroy(mei_class, devno); err_dev_create: cdev_del(&dev->cdev); err_dev_add: diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index fca832fcac57..f71a023aed3c 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -718,13 +718,10 @@ bool mei_hbuf_acquire(struct mei_device *dev); bool mei_write_is_idle(struct mei_device *dev); #if IS_ENABLED(CONFIG_DEBUG_FS) -int mei_dbgfs_register(struct mei_device *dev, const char *name); +void mei_dbgfs_register(struct mei_device *dev, const char *name); void mei_dbgfs_deregister(struct mei_device *dev); #else -static inline int mei_dbgfs_register(struct mei_device *dev, const char *name) -{ - return 0; -} +static inline void mei_dbgfs_register(struct mei_device *dev, const char *name) {} static inline void mei_dbgfs_deregister(struct mei_device *dev) {} #endif /* CONFIG_DEBUG_FS */ -- cgit v1.2.3-55-g7522 From 65bbdd49b4722a09901469e57497850311c017dc Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Fri, 14 Jun 2019 10:43:11 +0100 Subject: lkdtm: remove redundant initialization of ret The variable ret is being initialized with the value -EINVAL however this value is never read and ret is being re-assigned later on. Hence the initialization is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King Acked-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- drivers/misc/lkdtm/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/misc') diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c index bae3b3763f3e..d416359daf06 100644 --- a/drivers/misc/lkdtm/core.c +++ b/drivers/misc/lkdtm/core.c @@ -387,7 +387,7 @@ static int __init lkdtm_module_init(void) { struct crashpoint *crashpoint = NULL; const struct crashtype *crashtype = NULL; - int ret = -EINVAL; + int ret; int i; /* Neither or both of these need to be set */ -- cgit v1.2.3-55-g7522