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x86: platform: 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: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <x86@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-01-22 15:35:41 +01:00
parent 5dd82ba9e2
commit 519e96ee11
4 changed files with 13 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
arch/x86/platform/atom/punit_atom_debug.c
View File

@ -113,24 +113,12 @@ DEFINE_SHOW_ATTRIBUTE(punit_dev_state);
static struct dentry *punit_dbg_file;
static int punit_dbgfs_register(struct punit_device *punit_device)
static void punit_dbgfs_register(struct punit_device *punit_device)
{
struct dentry *dev_state;
punit_dbg_file = debugfs_create_dir("punit_atom", NULL);
if (!punit_dbg_file)
return -ENXIO;
dev_state = debugfs_create_file("dev_power_state", 0444,
punit_dbg_file, punit_device,
&punit_dev_state_fops);
if (!dev_state) {
pr_err("punit_dev_state register failed\n");
debugfs_remove(punit_dbg_file);
return -ENXIO;
}
return 0;
debugfs_create_file("dev_power_state", 0444, punit_dbg_file,
punit_device, &punit_dev_state_fops);
}
static void punit_dbgfs_unregister(void)
@ -154,15 +142,12 @@ MODULE_DEVICE_TABLE(x86cpu, intel_punit_cpu_ids);
static int __init punit_atom_debug_init(void)
{
const struct x86_cpu_id *id;
int ret;
id = x86_match_cpu(intel_punit_cpu_ids);
if (!id)
return -ENODEV;
ret = punit_dbgfs_register((struct punit_device *)id->driver_data);
if (ret < 0)
return ret;
punit_dbgfs_register((struct punit_device *)id->driver_data);
return 0;
}

12
arch/x86/platform/intel-quark/imr.c
View File

@ -35,7 +35,6 @@
#include <linux/types.h>
struct imr_device {
struct dentry *file;
bool init;
struct mutex lock;
int max_imr;
@ -231,13 +230,11 @@ DEFINE_SHOW_ATTRIBUTE(imr_dbgfs_state);
* imr_debugfs_register - register debugfs hooks.
*
* @idev: pointer to imr_device structure.
* @return: 0 on success - errno on failure.
*/
static int imr_debugfs_register(struct imr_device *idev)
static void imr_debugfs_register(struct imr_device *idev)
{
idev->file = debugfs_create_file("imr_state", 0444, NULL, idev,
debugfs_create_file("imr_state", 0444, NULL, idev,
&imr_dbgfs_state_fops);
return PTR_ERR_OR_ZERO(idev->file);
}
/**
@ -582,7 +579,6 @@ static const struct x86_cpu_id imr_ids[] __initconst = {
static int __init imr_init(void)
{
struct imr_device *idev = &imr_dev;
int ret;
if (!x86_match_cpu(imr_ids) || !iosf_mbi_available())
return -ENODEV;
@ -592,9 +588,7 @@ static int __init imr_init(void)
idev->init = true;
mutex_init(&idev->lock);
ret = imr_debugfs_register(idev);
if (ret != 0)
pr_warn("debugfs register failed!\n");
imr_debugfs_register(idev);
imr_fixup_memmap(idev);
return 0;
}

21
arch/x86/platform/intel/iosf_mbi.c
View File

@ -470,31 +470,16 @@ static struct dentry *iosf_dbg;
static void iosf_sideband_debug_init(void)
{
struct dentry *d;
iosf_dbg = debugfs_create_dir("iosf_sb", NULL);
if (IS_ERR_OR_NULL(iosf_dbg))
return;
/* mdr */
d = debugfs_create_x32("mdr", 0660, iosf_dbg, &dbg_mdr);
if (!d)
goto cleanup;
debugfs_create_x32("mdr", 0660, iosf_dbg, &dbg_mdr);
/* mcrx */
d = debugfs_create_x32("mcrx", 0660, iosf_dbg, &dbg_mcrx);
if (!d)
goto cleanup;
debugfs_create_x32("mcrx", 0660, iosf_dbg, &dbg_mcrx);
/* mcr - initiates mailbox tranaction */
d = debugfs_create_file("mcr", 0660, iosf_dbg, &dbg_mcr, &iosf_mcr_fops);
if (!d)
goto cleanup;
return;
cleanup:
debugfs_remove_recursive(d);
debugfs_create_file("mcr", 0660, iosf_dbg, &dbg_mcr, &iosf_mcr_fops);
}
static void iosf_debugfs_init(void)

15
arch/x86/platform/uv/tlb_uv.c
View File

@ -66,7 +66,6 @@ static struct tunables tunables[] = {
};
static struct dentry *tunables_dir;
static struct dentry *tunables_file;
/* these correspond to the statistics printed by ptc_seq_show() */
static char *stat_description[] = {
@ -1700,18 +1699,8 @@ static int __init uv_ptc_init(void)
}
tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL);
if (!tunables_dir) {
pr_err("unable to create debugfs directory %s\n",
UV_BAU_TUNABLES_DIR);
return -EINVAL;
}
tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600,
tunables_dir, NULL, &tunables_fops);
if (!tunables_file) {
pr_err("unable to create debugfs file %s\n",
UV_BAU_TUNABLES_FILE);
return -EINVAL;
}
debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600, tunables_dir, NULL,
&tunables_fops);
return 0;
}