From ec017d6b60f8aa400987fe95cd839e9ba5dda41d Mon Sep 17 00:00:00 2001 From: Maciej Żenczykowski Date: Thu, 1 Jul 2021 04:48:31 -0700 Subject: usb: gadget: f_ncm: remove check for NULL skb_tx_data in timer function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This condition is already checked for in ncm_wrap_ntb(), except that that check is done with eth_dev->lock held (it is grabbed by eth_start_xmit). It's best to not be reaching into ncm struct without locks held. Cc: Brooke Basile Cc: "Bryan O'Donoghue" Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: Lorenzo Colitti Signed-off-by: Maciej Żenczykowski Link: https://lore.kernel.org/r/20210701114834.884597-3-zenczykowski@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_ncm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c index e45a938424a4..77f55b3c805a 100644 --- a/drivers/usb/gadget/function/f_ncm.c +++ b/drivers/usb/gadget/function/f_ncm.c @@ -1156,8 +1156,7 @@ static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data) struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer); struct net_device *netdev = READ_ONCE(ncm->netdev); - /* Only send if data is available. */ - if (netdev && ncm->skb_tx_data) { + if (netdev) { /* XXX This allowance of a NULL skb argument to ndo_start_xmit * XXX is not sane. The gadget layer should be redesigned so * XXX that the dev->wrap() invocations to build SKBs is transparent -- cgit v1.2.3