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Date: Sat, 8 Jan 2022 22:43:24 +0100 From: Marc Kleine-Budde <mkl@...gutronix.de> To: netdev@...r.kernel.org Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org, kernel@...gutronix.de, Tom Rix <trix@...hat.com>, Vincent Mailhol <mailhol.vincent@...adoo.fr>, Marc Kleine-Budde <mkl@...gutronix.de> Subject: [PATCH net-next 01/22] can: janz-ican3: initialize dlc variable From: Tom Rix <trix@...hat.com> Clang static analysis reports this problem janz-ican3.c:1311:2: warning: Undefined or garbage value returned to caller return dlc; ^~~~~~~~~~ dlc is only set with this conditional if (!(cf->can_id & CAN_RTR_FLAG)) dlc = cf->len; But is always returned. So initialize dlc to 0. Fixes: cc4b08c31b5c ("can: do not increase tx_bytes statistics for RTR frames") Link: https://lore.kernel.org/all/20220108143319.3986923-1-trix@redhat.com Signed-off-by: Tom Rix <trix@...hat.com> Acked-by: Vincent Mailhol <mailhol.vincent@...adoo.fr> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de> --- drivers/net/can/janz-ican3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c index 5b677af5f2a4..808c105cf8f7 100644 --- a/drivers/net/can/janz-ican3.c +++ b/drivers/net/can/janz-ican3.c @@ -1285,7 +1285,7 @@ static unsigned int ican3_get_echo_skb(struct ican3_dev *mod) { struct sk_buff *skb = skb_dequeue(&mod->echoq); struct can_frame *cf; - u8 dlc; + u8 dlc = 0; /* this should never trigger unless there is a driver bug */ if (!skb) { base-commit: 82192cb497f9eca6c0d44dbc173e68d59ea2f3c9 -- 2.34.1
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