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linux-can-fixes-for-4.17-20180510

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Merge tag 'linux-can-fixes-for-4.17-20180510' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
this is a pull request for net/master consisting of 2 patches.

Both patches are from Lukas Wunner and fix two problems found in the
hi311x CAN driver under high load situations.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-05-10 17:57:11 -04:00
parent 2fdae0349f 32bee8f48f
commit ca3943c4aa
1 changed files with 7 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/net/can/spi/hi311x.c
View file

@ -91,6 +91,7 @@
#define HI3110_STAT_BUSOFF BIT(2)
#define HI3110_STAT_ERRP BIT(3)
#define HI3110_STAT_ERRW BIT(4)
#define HI3110_STAT_TXMTY BIT(7)
#define HI3110_BTR0_SJW_SHIFT 6
#define HI3110_BTR0_BRP_SHIFT 0
@ -427,8 +428,10 @@ static int hi3110_get_berr_counter(const struct net_device *net,
struct hi3110_priv *priv = netdev_priv(net);
struct spi_device *spi = priv->spi;
mutex_lock(&priv->hi3110_lock);
bec->txerr = hi3110_read(spi, HI3110_READ_TEC);
bec->rxerr = hi3110_read(spi, HI3110_READ_REC);
mutex_unlock(&priv->hi3110_lock);
return 0;
}
@ -735,10 +738,7 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id)
}
}
if (intf == 0)
break;
if (intf & HI3110_INT_TXCPLT) {
if (priv->tx_len && statf & HI3110_STAT_TXMTY) {
net->stats.tx_packets++;
net->stats.tx_bytes += priv->tx_len - 1;
can_led_event(net, CAN_LED_EVENT_TX);
@ -748,6 +748,9 @@ static irqreturn_t hi3110_can_ist(int irq, void *dev_id)
}
netif_wake_queue(net);
}
if (intf == 0)
break;
}
mutex_unlock(&priv->hi3110_lock);
return IRQ_HANDLED;