diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2018-10-31 12:37:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-01 11:42:52 +0300 |
| commit | b3f1f493529e060fd3e9d4fe5b406f8379b24d71 (patch) | |
| tree | 03d36c7d77d8b64b7651d24b45225b2f0d1c3048 /drivers | |
| parent | dca24b512763930963408ea5c78a2f223a73a2a8 (diff) | |
| download | linux-b3f1f493529e060fd3e9d4fe5b406f8379b24d71.tar.xz | |
can: dev: can_get_echo_skb(): factor out non sending code to __can_get_echo_skb()
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/dev.c | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index b6a681bce400..ae08bc6e7267 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -476,14 +476,7 @@ void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, } 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); @@ -494,13 +487,34 @@ unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx) 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); |