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can: dev: can_get_echo_skb(): factor out non sending code to __can_get_echo_skb()

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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>
This commit is contained in:
Marc Kleine-Budde 2018-10-31 10:37:46 +01:00
parent e05237f9da
commit a4310fa2f2
2 changed files with 26 additions and 11 deletions
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1
include/linux/can/dev.h
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@ -169,6 +169,7 @@ void can_change_state(struct net_device *dev, struct can_frame *cf,
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);