[PATCH] rtc: sysfs: fix NULL check in rtc_add_groups()
From: Dan Carpenter <hidden>
Date: 2018-08-27 13:08:54
Also in:
kernel-janitors
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
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: a0a1a1ba3032 ("rtc: sysfs: facilitate attribute add to rtc device")
Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index f1ff30ade534..9746c32eee2e 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c@@ -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;