Patch "regmap: debugfs: Fix a erroneous check after snprintf()" has been added to the 6.5-stable tree

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

    regmap: debugfs: Fix a erroneous check after snprintf()

to the 6.5-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:
     regmap-debugfs-fix-a-erroneous-check-after-snprintf.patch
and it can be found in the queue-6.5 subdirectory.

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



commit cad7243fea3d43719e50ae9abf98e4f854fc2dc5
Author: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date:   Mon Sep 4 22:04:06 2023 +0200

    regmap: debugfs: Fix a erroneous check after snprintf()
    
    [ Upstream commit d3601857e14de6369f00ae19564f1d817d175d19 ]
    
    This error handling looks really strange.
    Check if the string has been truncated instead.
    
    Fixes: f0c2319f9f19 ("regmap: Expose the driver name in debugfs")
    Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/8595de2462c490561f70020a6d11f4d6b652b468.1693857825.git.christophe.jaillet@xxxxxxxxxx
    Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index f36027591e1a8..bdd80b73c3e6c 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -48,7 +48,7 @@ static ssize_t regmap_name_read_file(struct file *file,
 		name = map->dev->driver->name;
 
 	ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
-	if (ret < 0) {
+	if (ret >= PAGE_SIZE) {
 		kfree(buf);
 		return ret;
 	}



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