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USB: musb: clean up debugfs file and directory creation

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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 of this, lots of init functions do not need to have return
values, so this cleans up a lot of unused error handling code that never
could have triggered in the past.

Cc: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2018-05-29 17:30:48 +02:00
parent a941fc3957
commit 8a1ef171ff
4 changed files with 11 additions and 52 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/usb/musb/musb_core.c
View file

@ -2387,9 +2387,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
if (status < 0)
goto fail3;
status = musb_init_debugfs(musb);
if (status < 0)
goto fail4;
musb_init_debugfs(musb);
status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
if (status)
@ -2404,7 +2402,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
fail5:
musb_exit_debugfs(musb);
fail4:
musb_gadget_cleanup(musb);
musb_host_cleanup(musb);

5
drivers/usb/musb/musb_debug.h
View file

@ -20,12 +20,11 @@
void musb_dbg(struct musb *musb, const char *fmt, ...);
#ifdef CONFIG_DEBUG_FS
int musb_init_debugfs(struct musb *musb);
void musb_init_debugfs(struct musb *musb);
void musb_exit_debugfs(struct musb *musb);
#else
static inline int musb_init_debugfs(struct musb *musb)
static inline void musb_init_debugfs(struct musb *musb)
{
return 0;
}
static inline void musb_exit_debugfs(struct musb *musb)
{

44
drivers/usb/musb/musb_debugfs.c
View file

@ -321,48 +321,18 @@ static const struct file_operations musb_softconnect_fops = {
.release = single_release,
};
int musb_init_debugfs(struct musb *musb)
void musb_init_debugfs(struct musb *musb)
{
struct dentry *root;
struct dentry *file;
int ret;
struct dentry *root;
root = debugfs_create_dir(dev_name(musb->controller), NULL);
if (!root) {
ret = -ENOMEM;
goto err0;
}
file = debugfs_create_file("regdump", S_IRUGO, root, musb,
&musb_regdump_fops);
if (!file) {
ret = -ENOMEM;
goto err1;
}
file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
root, musb, &musb_test_mode_fops);
if (!file) {
ret = -ENOMEM;
goto err1;
}
file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR,
root, musb, &musb_softconnect_fops);
if (!file) {
ret = -ENOMEM;
goto err1;
}
musb->debugfs_root = root;
return 0;
err1:
debugfs_remove_recursive(root);
err0:
return ret;
debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb,
&musb_test_mode_fops);
debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb,
&musb_softconnect_fops);
}
void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)

9
drivers/usb/musb/musb_dsps.c
View file

@ -399,24 +399,17 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue)
{
struct dentry *root;
struct dentry *file;
char buf[128];
sprintf(buf, "%s.dsps", dev_name(musb->controller));
root = debugfs_create_dir(buf, NULL);
if (!root)
return -ENOMEM;
glue->dbgfs_root = root;
glue->regset.regs = dsps_musb_regs;
glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs);
glue->regset.base = musb->ctrl_base;
file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
if (!file) {
debugfs_remove_recursive(root);
return -ENOMEM;
}
debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset);
return 0;
}