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net: can: mttcan: Fix build for Linux v6.16

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In Linux v6.16, the structure 'data_bittiming_params' was added to the
'can_priv' structure and all the related data bittiming parameters were
moved under this new structure. Add a test to conftest to determine if
this new structure is present and update the Tegra MTTCAN driver
accordingly.

JIRA LINQPJ14-60

Change-Id: Ibd8f6bd81a903b15a55d837023dada835a1e72ca
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3374645
(cherry picked from commit 86396ec47b78a7716a5faa8d492d74efc7f23dce)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3461874
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Jon Hunter
2025-06-02 16:31:55 +01:00
committed by mobile promotions
parent 96cae7f9de
commit 594c03645c
3 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/can/mttcan/native/m_ttcan_linux.c
View File

@@ -988,7 +988,11 @@ static int mttcan_do_set_bittiming(struct net_device *dev)
int err = 0;
struct mttcan_priv *priv = netdev_priv(dev);
const struct can_bittiming *bt = &priv->can.bittiming;
#if defined(NV_CAN_PRIV_STRUCT_HAS_STRUCT_DATA_BITTIMING_PARAMS) /* Linux v6.16 */
const struct can_bittiming *dbt = &priv->can.fd.data_bittiming;
#else
const struct can_bittiming *dbt = &priv->can.data_bittiming;
#endif
memcpy(&priv->ttcan->bt_config.nominal, bt,
sizeof(struct can_bittiming));
@@ -1197,7 +1201,11 @@ static struct net_device *alloc_mttcan_dev(void)
priv->dev = dev;
priv->can.bittiming_const = &mttcan_normal_bittiming_const;
#if defined(NV_CAN_PRIV_STRUCT_HAS_STRUCT_DATA_BITTIMING_PARAMS) /* Linux v6.16 */
priv->can.fd.data_bittiming_const = &mttcan_data_bittiming_const;
#else
priv->can.data_bittiming_const = &mttcan_data_bittiming_const;
#endif
priv->can.do_set_bittiming = mttcan_do_set_bittiming;
priv->can.do_set_mode = mttcan_set_mode;
priv->can.do_get_berr_counter = mttcan_get_berr_counter;

1
scripts/conftest/Makefile
View File

@@ -106,6 +106,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += blk_mq_f_should_merge
NV_CONFTEST_FUNCTION_COMPILE_TESTS += bus_type_struct_match_has_const_drv_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += bus_type_struct_remove_has_int_return_type
NV_CONFTEST_FUNCTION_COMPILE_TESTS += bus_type_struct_uevent_has_const_dev_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += can_priv_struct_has_struct_data_bittiming_params
NV_CONFTEST_FUNCTION_COMPILE_TESTS += class_attribute_struct_has_const_struct_class_attribute
NV_CONFTEST_FUNCTION_COMPILE_TESTS += class_create_has_no_owner_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += class_struct_devnode_has_const_dev_arg

18
scripts/conftest/conftest.sh
View File

@@ -6832,6 +6832,24 @@ compile_test() {
compile_check_conftest "$CODE" "NV_BUS_TYPE_STRUCT_UEVENT_HAS_CONST_DEV_ARG" "" "types"
;;
can_priv_struct_has_struct_data_bittiming_params)
#
# Determine if the 'can_priv' structure has a member of type
# 'structure data_bittiming_params'.
#
# In Linux v6.16, commit b803c4a4f788 ("can: dev: add struct
# data_bittiming_params to group FD parameters") added the
# 'data_bittiming_params' structure to the 'can_priv' structure.
#
CODE="
#include <linux/can/dev.h>
int conftest_can_priv_struct_has_struct_data_bittiming_params(void) {
return offsetof(struct can_priv, fd);
}"
compile_check_conftest "$CODE" "NV_CAN_PRIV_STRUCT_HAS_STRUCT_DATA_BITTIMING_PARAMS" "" "types"
;;
class_attribute_struct_has_const_struct_class_attribute)
#
# Determine if struct class_attribute function has const type "struct class_attribute"