Patch "s390/zcore: no need to check return value of debugfs_create functions" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    s390/zcore: no need to check return value of debugfs_create functions

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-zcore-no-need-to-check-return-value-of-debugfs_.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d0d1623b333f3e7ba6827081333b6807bc791c84
Author: Alexander Egorenkov <egorenar@xxxxxxxxxxxxx>
Date:   Fri Feb 26 11:21:05 2021 +0100

    s390/zcore: no need to check return value of debugfs_create functions
    
    [ Upstream commit 7449ca87312a5b0390b765be65a126e6e5451026 ]
    
    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.
    
    See commit 7dd541a3fb34 ("s390: no need to check return value of debugfs_create functions").
    
    Signed-off-by: Alexander Egorenkov <egorenar@xxxxxxxxxxxxx>
    Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
    Stable-dep-of: 0b18c852cc6f ("tracing: Have saved_cmdlines arrays all in one allocation")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 3841c0e77df69..5f659fa9224a3 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -302,28 +302,12 @@ static int __init zcore_init(void)
 		goto fail;
 
 	zcore_dir = debugfs_create_dir("zcore" , NULL);
-	if (!zcore_dir) {
-		rc = -ENOMEM;
-		goto fail;
-	}
 	zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
 						NULL, &zcore_reipl_fops);
-	if (!zcore_reipl_file) {
-		rc = -ENOMEM;
-		goto fail_dir;
-	}
 	zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR|S_IWUSR, zcore_dir,
 					     NULL, &zcore_hsa_fops);
-	if (!zcore_hsa_file) {
-		rc = -ENOMEM;
-		goto fail_reipl_file;
-	}
-	return 0;
 
-fail_reipl_file:
-	debugfs_remove(zcore_reipl_file);
-fail_dir:
-	debugfs_remove(zcore_dir);
+	return 0;
 fail:
 	diag308(DIAG308_REL_HSA, NULL);
 	return rc;