[PATCH][next] can: etas_es58x: Fix potential null pointer dereference on pointer cf

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

The pointer cf is being null checked earlier in the code, however the
update of the rx_bytes statistics is dereferencing cf without null
checking cf.  Fix this by moving the statement into the following code
block that has a null cf check.

Addresses-Coverity: ("Dereference after null check")
Fixes: 8537257874e9 ("can: etas_es58x: add core support for ETAS ES58X CAN USB 
interfaces")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/net/can/usb/etas_es58x/es58x_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c 
b/drivers/net/can/usb/etas_es58x/es58x_core.c
index 7222b3b6ca46..5198e1d6b6ad 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -856,9 +856,10 @@ int es58x_rx_err_msg(struct net_device *netdev, enum 
es58x_err error,
         * consistency.
         */
        netdev->stats.rx_packets++;
-       netdev->stats.rx_bytes += cf->can_dlc;
 
        if (cf) {
+               netdev->stats.rx_bytes += cf->can_dlc;
+
                if (cf->data[1])
                        cf->can_id |= CAN_ERR_CRTL;
                if (cf->data[2] || cf->data[3]) {
-- 
2.30.2