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mt76: usb: fix possible NULL pointer dereference in mt76u_mcu_deinit

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Fix possible NULL pointer dereference in mt76u_mcu_deinit routine that
can occur if initialization path fails before calling mt76u_mcu_init_rx

Fixes: ee676cd501 ("mt76: add driver code for MT76x2u based devices")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2019-02-10 22:49:13 +01:00 • committed by Felix Fietkau
parent 5de4db8fcb
commit bdba48d57a
1 changed files with 5 additions and 3 deletions
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8
drivers/net/wireless/mediatek/mt76/usb_mcu.c
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@ -48,9 +48,11 @@ EXPORT_SYMBOL_GPL(mt76u_mcu_init_rx);
void mt76u_mcu_deinit(struct mt76_dev *dev)
{
struct mt76_usb *usb = &dev->usb;
struct mt76u_buf *buf = &dev->usb.mcu.res;
usb_kill_urb(usb->mcu.res.urb);
mt76u_buf_free(&usb->mcu.res);
if (buf->urb) {
usb_kill_urb(buf->urb);
mt76u_buf_free(buf);
}
}
EXPORT_SYMBOL_GPL(mt76u_mcu_deinit);