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rtc: sysfs: fix NULL check in rtc_add_groups()

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[ Upstream commit 777d8ae56d ]

devm_kcalloc() returns NULL, it never returns error pointers.  In the
current code we would return PTR_ERR(NULL) which is success, instead of
returning the -ENOMEM error code.

Fixes: a0a1a1ba30 ("rtc: sysfs: facilitate attribute add to rtc device")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter
2018-08-27 12:22:34 +03:00
committed by Greg Kroah-Hartman
parent a01d6a3204
commit 5a408693b4
1 changed files with 2 additions and 2 deletions
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4
drivers/rtc/rtc-sysfs.c
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@@ -338,8 +338,8 @@ int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps)
new_cnt = old_cnt + add_cnt + 1;
groups = devm_kcalloc(&rtc->dev, new_cnt, sizeof(*groups), GFP_KERNEL);
if (IS_ERR_OR_NULL(groups))
return PTR_ERR(groups);
if (!groups)
return -ENOMEM;
memcpy(groups, rtc->dev.groups, old_cnt * sizeof(*groups));
memcpy(groups + old_cnt, grps, add_cnt * sizeof(*groups));
groups[old_cnt + add_cnt] = NULL;