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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-07-04 16:36:49 +0200
committerJoerg Roedel <jroedel@suse.de>2019-07-04 17:26:18 +0200
commit9378bfeaafcbbdf234daeee93db31a3f2c815513 (patch)
tree8623734d721b704b8bbd7ea1337013118d7e2cf1 /drivers/iommu
parentiommu/omap: Use dev_get_drvdata() (diff)
downloadlinux-9378bfeaafcbbdf234daeee93db31a3f2c815513.tar.xz
linux-9378bfeaafcbbdf234daeee93db31a3f2c815513.zip
iommu/omap: 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: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/omap-iommu-debug.c35
1 files changed, 6 insertions, 29 deletions
diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c
index 4abc0ef522a8..f87a72821bad 100644
--- a/drivers/iommu/omap-iommu-debug.c
+++ b/drivers/iommu/omap-iommu-debug.c
@@ -239,17 +239,6 @@ DEBUG_FOPS_RO(regs);
DEFINE_SHOW_ATTRIBUTE(tlb);
DEFINE_SHOW_ATTRIBUTE(pagetable);
-#define __DEBUG_ADD_FILE(attr, mode) \
- { \
- struct dentry *dent; \
- dent = debugfs_create_file(#attr, mode, obj->debug_dir, \
- obj, &attr##_fops); \
- if (!dent) \
- goto err; \
- }
-
-#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 0400)
-
void omap_iommu_debugfs_add(struct omap_iommu *obj)
{
struct dentry *d;
@@ -257,23 +246,13 @@ void omap_iommu_debugfs_add(struct omap_iommu *obj)
if (!iommu_debug_root)
return;
- obj->debug_dir = debugfs_create_dir(obj->name, iommu_debug_root);
- if (!obj->debug_dir)
- return;
+ d = debugfs_create_dir(obj->name, iommu_debug_root);
+ obj->debug_dir = d;
- d = debugfs_create_u32("nr_tlb_entries", 0400, obj->debug_dir,
- &obj->nr_tlb_entries);
- if (!d)
- return;
-
- DEBUG_ADD_FILE_RO(regs);
- DEBUG_ADD_FILE_RO(tlb);
- DEBUG_ADD_FILE_RO(pagetable);
-
- return;
-
-err:
- debugfs_remove_recursive(obj->debug_dir);
+ debugfs_create_u32("nr_tlb_entries", 0400, d, &obj->nr_tlb_entries);
+ debugfs_create_file("regs", 0400, d, obj, &regs_fops);
+ debugfs_create_file("tlb", 0400, d, obj, &tlb_fops);
+ debugfs_create_file("pagetable", 0400, d, obj, &pagetable_fops);
}
void omap_iommu_debugfs_remove(struct omap_iommu *obj)
@@ -287,8 +266,6 @@ void omap_iommu_debugfs_remove(struct omap_iommu *obj)
void __init omap_iommu_debugfs_init(void)
{
iommu_debug_root = debugfs_create_dir("omap_iommu", NULL);
- if (!iommu_debug_root)
- pr_err("can't create debugfs dir\n");
}
void __exit omap_iommu_debugfs_exit(void)