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Subject[PATCH] 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 <haver@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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(-)

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:
--
2.22.0
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