can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx...

BugLink: https://bugs.launchpad.net/bugs/1954931
commit 36aea60fc892ce73f96d45dc7eb239c7c4c1fa69 upstream.

Check the direction bit in the error frame packet (EPACK) to determine
which net_device_stats {rx,tx}_errors counter to increase.

Fixes: 26ad340e582d ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Link: https://lore.kernel.org/all/20211208152122.250852-1-extja@kvaser.com
Cc: stable@vger.kernel.org
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index 74d9899fc904c099d51f23c591ec71b2acb6c37e..eb74cdf26b88c55e7df9fee2cc1d212c5b2a1e6b 100644 (file)
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -248,6 +248,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 #define KVASER_PCIEFD_SPACK_EWLR BIT(23)
 #define KVASER_PCIEFD_SPACK_EPLR BIT(24)
 
+/* Kvaser KCAN_EPACK second word */
+#define KVASER_PCIEFD_EPACK_DIR_TX BIT(0)
+
 struct kvaser_pciefd;
 
 struct kvaser_pciefd_can {
@@ -1285,7 +1288,10 @@ static int kvaser_pciefd_rx_error_frame(struct kvaser_pciefd_can *can,
 
        can->err_rep_cnt++;
        can->can.can_stats.bus_error++;
-       stats->rx_errors++;
+       if (p->header[1] & KVASER_PCIEFD_EPACK_DIR_TX)
+               stats->tx_errors++;
+       else
+               stats->rx_errors++;
 
        can->bec.txerr = bec.txerr;
        can->bec.rxerr = bec.rxerr;