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can: flexcan: increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails 

The call to can_rx_offload_queue_sorted() may fail and return an error
(in the current implementation due to resource shortage). The passed skb
is consumed.

This patch adds incrementing of the appropriate error counters to let
the device statistics reflect that there's a problem.

Reported-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2019-07-15 20:53:08 +02:00
parent 1f7f504dcd
commit 758124335a
1 changed files with 8 additions and 2 deletions
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10
drivers/net/can/flexcan.c
View File

@ -677,6 +677,7 @@ static void flexcan_irq_bus_err(struct net_device *dev, u32 reg_esr)
struct can_frame *cf;
bool rx_errors = false, tx_errors = false;
u32 timestamp;
int err;
timestamp = priv->read(&regs->timer) << 16;
@ -725,7 +726,9 @@ static void flexcan_irq_bus_err(struct net_device *dev, u32 reg_esr)
if (tx_errors)
dev->stats.tx_errors++;
can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
err = can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
if (err)
dev->stats.rx_fifo_errors++;
}
static void flexcan_irq_state(struct net_device *dev, u32 reg_esr)
@ -738,6 +741,7 @@ static void flexcan_irq_state(struct net_device *dev, u32 reg_esr)
int flt;
struct can_berr_counter bec;
u32 timestamp;
int err;
timestamp = priv->read(&regs->timer) << 16;
@ -769,7 +773,9 @@ static void flexcan_irq_state(struct net_device *dev, u32 reg_esr)
if (unlikely(new_state == CAN_STATE_BUS_OFF))
can_bus_off(dev);
can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
err = can_rx_offload_queue_sorted(&priv->offload, skb, timestamp);
if (err)
dev->stats.rx_fifo_errors++;
}
static inline struct flexcan_priv *rx_offload_to_priv(struct can_rx_offload *offload)