[PATCH 1/1] usb: fix improper return value when kzalloc fails

From: Pan Bian
Date: Tue Nov 29 2016 - 07:56:30 EST

The comment says function wa_nep_queue() should return 0 if ok, and <0
errno code on error. However, its implementation always returns 0, even
if the call to kzalloc() fails. As a result, the return value may be
inconsistent with the execution status, which may mislead the callers.
This patch fixes the bug, returning -ENOMEM when the call to kzalloc()

Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
drivers/usb/wusbcore/wa-nep.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/wusbcore/wa-nep.c b/drivers/usb/wusbcore/wa-nep.c
index ed46222..e3819fc 100644
--- a/drivers/usb/wusbcore/wa-nep.c
+++ b/drivers/usb/wusbcore/wa-nep.c
@@ -198,6 +198,7 @@ static int wa_nep_queue(struct wahc *wa, size_t size)
if (nw == NULL) {
if (printk_ratelimit())
dev_err(dev, "No memory to queue notification\n");
+ result = -ENOMEM;
goto out;
INIT_WORK(&nw->work, wa_notif_dispatch);