[PATCH] powerpc/iommu/debug: Remove redundant NULL check

Fix the following coccicheck warnings:

./fs/io_uring.c:5989:4-9: WARNING: NULL check before some freeing
functions is not needed.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Jiapeng Chong <redacted>
---
 arch/powerpc/kernel/iommu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index c00214a..2168714 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c

@@ -72,8 +72,7 @@ static void iommu_debugfs_del(struct iommu_table *tbl)
 
 	sprintf(name, "%08lx", tbl->it_index);
 	liobn_entry = debugfs_lookup(name, iommu_debugfs_dir);
-	if (liobn_entry)
-		debugfs_remove(liobn_entry);
+	debugfs_remove(liobn_entry);
 }
 #else
 static void iommu_debugfs_add(struct iommu_table *tbl){}

-- 
1.8.3.1

Hi Jiapeng Chong, [off-list ref] writes:

Fix the following coccicheck warnings:

./fs/io_uring.c:5989:4-9: WARNING: NULL check before some freeing
functions is not needed.

This looks correct to me, and matches the description of debugfs_remove
in Documentation/filesystems/debugfs.rst.

If you have a number of similar fixes it might be helpful to do them in
a single bigger patch, but I'm not sure if coccicheck reports much else
as I don't have coccinelle installed at the moment.

Reviewed-by: Daniel Axtens <redacted>

Kind regards,
Daniel

Daniel Axtens [off-list ref] writes:

It looks like the kernel test robot also reported this:
"[PATCH] powerpc/iommu/debug: fix ifnullfree.cocci warnings"
Weirdly I don't see it in patchwork.

I'm not sure which one mpe will want to take but either would do.

quoted

Fix the following coccicheck warnings:

./fs/io_uring.c:5989:4-9: WARNING: NULL check before some freeing
functions is not needed.

(Also, while unimportant, that's technically not the error you fix here
as it's for a different file!)

This looks correct to me, and matches the description of debugfs_remove
in Documentation/filesystems/debugfs.rst.

If you have a number of similar fixes it might be helpful to do them in
a single bigger patch, but I'm not sure if coccicheck reports much else
as I don't have coccinelle installed at the moment.

Reviewed-by: Daniel Axtens <redacted>

Kind regards,
Daniel