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extcon: return error code on failure 

Function get_zeroed_page() returns a NULL pointer if there is no enough
memory. In function extcon_sync(), it returns 0 if the call to
get_zeroed_page() fails. The return value 0 indicates success in the
context, which is incosistent with the execution status. This patch
fixes the bug by returning -ENOMEM.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188611

Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: a580982f08
Cc: stable <stable@vger.kernel.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pan Bian 2016-12-03 16:56:49 +08:00 committed by Greg Kroah-Hartman
parent 488debb997
commit 5b11ebedd6
1 changed files with 1 additions and 1 deletions
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2
drivers/extcon/extcon.c
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@ -453,7 +453,7 @@ int extcon_sync(struct extcon_dev *edev, unsigned int id)
dev_err(&edev->dev, "out of memory in extcon_set_state\n");
kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE);
return 0;
return -ENOMEM;
}
length = name_show(&edev->dev, NULL, prop_buf);