Merge tag 'linux-can-next-for-6.9-20240220' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2024-02-20

this is a pull request of 9 patches for net-next/master.

The first patch is by Francesco Dolcini and removes a redundant check
for pm_clock_support from the m_can driver.

Martin Hundebøll contributes 3 patches to the m_can/tcan4x5x driver to
allow resume upon RX of a CAN frame.

3 patches by Srinivas Goud add support for ECC statistics to the
xilinx_can driver.

The last 2 patches are by Oliver Hartkopp and me, target the CAN RAW
protocol and fix an error in the getsockopt() for CAN-XL introduced in
the previous pull request to net-next (linux-can-next-for-6.9-20240213).

linux-can-next-for-6.9-20240220

* tag 'linux-can-next-for-6.9-20240220' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: raw: raw_getsockopt(): reduce scope of err
  can: raw: fix getsockopt() for new CAN_RAW_XL_VCID_OPTS
  can: xilinx_can: Add ethtool stats interface for ECC errors
  can: xilinx_can: Add ECC support
  dt-bindings: can: xilinx_can: Add 'xlnx,has-ecc' optional property
  can: tcan4x5x: support resuming from rx interrupt signal
  can: m_can: allow keeping the transceiver running in suspend
  dt-bindings: can: tcan4x5x: Document the wakeup-source flag
  can: m_can: remove redundant check for pm_clock_support
====================

Link: https://lore.kernel.org/r/20240220085130.2936533-1-mkl@pengutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/net/can/raw.c b/net/can/raw.c
index cb8e6f788af8..00533f64d69d 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -756,7 +756,6 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 	struct raw_sock *ro = raw_sk(sk);
 	int len;
 	void *val;
-	int err = 0;
 
 	if (level != SOL_CAN_RAW)
 		return -EINVAL;
@@ -766,7 +765,9 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 		return -EINVAL;
 
 	switch (optname) {
-	case CAN_RAW_FILTER:
+	case CAN_RAW_FILTER: {
+		int err = 0;
+
 		lock_sock(sk);
 		if (ro->count > 0) {
 			int fsize = ro->count * sizeof(struct can_filter);
@@ -791,7 +792,7 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 		if (!err)
 			err = put_user(len, optlen);
 		return err;
-
+	}
 	case CAN_RAW_ERR_FILTER:
 		if (len > sizeof(can_err_mask_t))
 			len = sizeof(can_err_mask_t);
@@ -822,7 +823,9 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 		val = &ro->xl_frames;
 		break;
 
-	case CAN_RAW_XL_VCID_OPTS:
+	case CAN_RAW_XL_VCID_OPTS: {
+		int err = 0;
+
 		/* user space buffer to small for VCID opts? */
 		if (len < sizeof(ro->raw_vcid_opts)) {
 			/* return -ERANGE and needed space in optlen */
@@ -835,8 +838,10 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 			if (copy_to_user(optval, &ro->raw_vcid_opts, len))
 				err = -EFAULT;
 		}
-		break;
-
+		if (!err)
+			err = put_user(len, optlen);
+		return err;
+	}
 	case CAN_RAW_JOIN_FILTERS:
 		if (len > sizeof(int))
 			len = sizeof(int);