4.19-stable review patch. If anyone has any objections, please let me know.
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From: Marc Kleine-Budde mkl@pengutronix.de
commit a4310fa2f24687888ce80fdb0e88583561a23700 upstream.
This patch factors out all non sending parts of can_get_echo_skb() into a seperate function __can_get_echo_skb(), so that it can be re-used in an upcoming patch.
Cc: linux-stable stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/dev.c | 36 +++++++++++++++++++++++++----------- include/linux/can/dev.h | 1 + 2 files changed, 26 insertions(+), 11 deletions(-)
--- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -477,14 +477,7 @@ void can_put_echo_skb(struct sk_buff *sk } EXPORT_SYMBOL_GPL(can_put_echo_skb);
-/* - * Get the skb from the stack and loop it back locally - * - * The function is typically called when the TX done interrupt - * is handled in the device driver. The driver must protect - * access to priv->echo_skb, if necessary. - */ -unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx) +struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 *len_ptr) { struct can_priv *priv = netdev_priv(dev);
@@ -495,13 +488,34 @@ unsigned int can_get_echo_skb(struct net struct can_frame *cf = (struct can_frame *)skb->data; u8 dlc = cf->can_dlc;
- netif_rx(priv->echo_skb[idx]); + *len_ptr = dlc; priv->echo_skb[idx] = NULL;
- return dlc; + return skb; }
- return 0; + return NULL; +} + +/* + * Get the skb from the stack and loop it back locally + * + * The function is typically called when the TX done interrupt + * is handled in the device driver. The driver must protect + * access to priv->echo_skb, if necessary. + */ +unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx) +{ + struct sk_buff *skb; + u8 len; + + skb = __can_get_echo_skb(dev, idx, &len); + if (!skb) + return 0; + + netif_rx(skb); + + return len; } EXPORT_SYMBOL_GPL(can_get_echo_skb);
--- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -169,6 +169,7 @@ void can_change_state(struct net_device
void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, unsigned int idx); +struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 *len_ptr); unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx); void can_free_echo_skb(struct net_device *dev, unsigned int idx);