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can: isotp: implement cleanups / improvements from review 

As pointed out by Jakub Kicinski here:
http://lore.kernel.org/r/20201009175751.5c54097f@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com
this patch addresses the remarked issues:

- remove empty line in comment
- remove default=y for CAN_ISOTP in Kconfig
- make use of pr_notice_once()
- use GFP_ATOMIC instead of gfp_any() in soft hrtimer context

The version strings in the CAN subsystem are removed by a separate patch.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/r/20201012074354.25839-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp 2020-10-12 09:43:53 +02:00 committed by Marc Kleine-Budde
parent bc081a693a
commit ac911bfeb3
3 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/uapi/linux/can/isotp.h
View File

@ -160,7 +160,6 @@ struct can_isotp_ll_options {
* these default settings can be changed via sockopts. * these default settings can be changed via sockopts.
* For that reason the STmin value is intentionally _not_ checked for * For that reason the STmin value is intentionally _not_ checked for
* consistency and copied directly into the flow control (FC) frame. * consistency and copied directly into the flow control (FC) frame.
*
*/ */
#endif /* !_UAPI_CAN_ISOTP_H */ #endif /* !_UAPI_CAN_ISOTP_H */

3
net/can/Kconfig
View File

@ -57,7 +57,6 @@ source "net/can/j1939/Kconfig"
config CAN_ISOTP config CAN_ISOTP
tristate "ISO 15765-2:2016 CAN transport protocol" tristate "ISO 15765-2:2016 CAN transport protocol"
default y
help help
CAN Transport Protocols offer support for segmented Point-to-Point CAN Transport Protocols offer support for segmented Point-to-Point
communication between CAN nodes via two defined CAN Identifiers. communication between CAN nodes via two defined CAN Identifiers.
@ -67,6 +66,8 @@ config CAN_ISOTP
vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN traffic. vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN traffic.
This protocol driver implements data transfers according to This protocol driver implements data transfers according to
ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types. ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
If you want to perform automotive vehicle diagnostic services (UDS),
say 'y'.
source "drivers/net/can/Kconfig" source "drivers/net/can/Kconfig"

14
net/can/isotp.c
View File

@ -222,8 +222,8 @@ static int isotp_send_fc(struct sock *sk, int ae, u8 flowstatus)
can_send_ret = can_send(nskb, 1); can_send_ret = can_send(nskb, 1);
if (can_send_ret) if (can_send_ret)
printk_once(KERN_NOTICE "can-isotp: %s: can_send_ret %d\n", pr_notice_once("can-isotp: %s: can_send_ret %d\n",
__func__, can_send_ret); __func__, can_send_ret);
dev_put(dev); dev_put(dev);
@ -769,7 +769,7 @@ static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
isotp_tx_burst: isotp_tx_burst:
skb = alloc_skb(so->ll.mtu + sizeof(struct can_skb_priv), skb = alloc_skb(so->ll.mtu + sizeof(struct can_skb_priv),
gfp_any()); GFP_ATOMIC);
if (!skb) { if (!skb) {
dev_put(dev); dev_put(dev);
break; break;
@ -798,8 +798,8 @@ isotp_tx_burst:
can_send_ret = can_send(skb, 1); can_send_ret = can_send(skb, 1);
if (can_send_ret) if (can_send_ret)
printk_once(KERN_NOTICE "can-isotp: %s: can_send_ret %d\n", pr_notice_once("can-isotp: %s: can_send_ret %d\n",
__func__, can_send_ret); __func__, can_send_ret);
if (so->tx.idx >= so->tx.len) { if (so->tx.idx >= so->tx.len) {
/* we are done */ /* we are done */
@ -942,8 +942,8 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
err = can_send(skb, 1); err = can_send(skb, 1);
dev_put(dev); dev_put(dev);
if (err) { if (err) {
printk_once(KERN_NOTICE "can-isotp: %s: can_send_ret %d\n", pr_notice_once("can-isotp: %s: can_send_ret %d\n",
__func__, err); __func__, err);
return err; return err;
} }