Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
1
fork

Configure Feed

Select the types of activity you want to include in your feed.

can: Kconfig: select CAN driver infrastructure by default

The CAN bus support enabled with CONFIG_CAN provides a socket-based
access to CAN interfaces. With the introduction of the latest CAN protocol
CAN XL additional configuration status information needs to be exposed to
the network layer than formerly provided by standard Linux network drivers.

This requires the CAN driver infrastructure to be selected by default.
As the CAN network layer can only operate on CAN interfaces anyway all
distributions and common default configs enable at least one CAN driver.

So selecting CONFIG_CAN_DEV when CONFIG_CAN is selected by the user has
no effect on established configurations but solves potential build issues
when CONFIG_CAN[_XXX]=y is set together with CANFIG_CAN_DEV=m

Fixes: 1a620a723853 ("can: raw: instantly reject unsupported CAN frames")
Reported-by: Vincent Mailhol <mailhol@kernel.org>
Closes: https://lore.kernel.org/all/CAMZ6RqL_nGszwoLPXn1Li8op-ox4k3Hs6p=Hw6+w0W=DTtobPw@mail.gmail.com/
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511280531.YnWW2Rxc-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202511280842.djCQ0N0O-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202511282325.uVQFRTkA-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202511291520.guIE1QHj-lkp@intel.com/
Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://patch.msgid.link/20251129090500.17484-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

authored by

Oliver Hartkopp and committed by
Marc Kleine-Budde
cb2dc6d2 ff736a28

+8
+7
include/linux/can/dev.h
··· 111 111 void free_candev(struct net_device *dev); 112 112 113 113 /* a candev safe wrapper around netdev_priv */ 114 + #if IS_ENABLED(CONFIG_CAN_NETLINK) 114 115 struct can_priv *safe_candev_priv(struct net_device *dev); 116 + #else 117 + static inline struct can_priv *safe_candev_priv(struct net_device *dev) 118 + { 119 + return NULL; 120 + } 121 + #endif 115 122 116 123 int open_candev(struct net_device *dev); 117 124 void close_candev(struct net_device *dev);
+1
net/can/Kconfig
··· 5 5 6 6 menuconfig CAN 7 7 tristate "CAN bus subsystem support" 8 + select CAN_DEV 8 9 help 9 10 Controller Area Network (CAN) is a slow (up to 1Mbit/s) serial 10 11 communications protocol. Development of the CAN bus started in