summaryrefslogtreecommitdiffstats
path: root/drivers/net/can/sja1000
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2012-02-26 21:55:51 -0500
committerDavid S. Miller <davem@davemloft.net>2012-02-26 21:55:51 -0500
commitff4783ce78c08d2990126ce1874250ae8e72bbd2 (patch)
tree5c95885a4ab768101dd72942b57c238d452a7565 /drivers/net/can/sja1000
parent622121719934f60378279eb440d3cec2fc3176d2 (diff)
parent203738e548cefc3fc3c2f73a9063176c9f3583d5 (diff)
downloadblackbird-op-linux-ff4783ce78c08d2990126ce1874250ae8e72bbd2.tar.gz
blackbird-op-linux-ff4783ce78c08d2990126ce1874250ae8e72bbd2.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: drivers/net/ethernet/sfc/rx.c Overlapping changes in drivers/net/ethernet/sfc/rx.c, one to change the rx_buf->is_page boolean into a set of u16 flags, and another to adjust how ->ip_summed is initialized. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/can/sja1000')
-rw-r--r--drivers/net/can/sja1000/sja1000.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index ebbcfcafe29b..5e10472371ed 100644
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -95,11 +95,16 @@ static void sja1000_write_cmdreg(struct sja1000_priv *priv, u8 val)
spin_unlock_irqrestore(&priv->cmdreg_lock, flags);
}
+static int sja1000_is_absent(struct sja1000_priv *priv)
+{
+ return (priv->read_reg(priv, REG_MOD) == 0xFF);
+}
+
static int sja1000_probe_chip(struct net_device *dev)
{
struct sja1000_priv *priv = netdev_priv(dev);
- if (priv->reg_base && (priv->read_reg(priv, 0) == 0xFF)) {
+ if (priv->reg_base && sja1000_is_absent(priv)) {
printk(KERN_INFO "%s: probing @0x%lX failed\n",
DRV_NAME, dev->base_addr);
return 0;
@@ -492,6 +497,9 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id)
while ((isrc = priv->read_reg(priv, REG_IR)) && (n < SJA1000_MAX_IRQ)) {
n++;
status = priv->read_reg(priv, REG_SR);
+ /* check for absent controller due to hw unplug */
+ if (status == 0xFF && sja1000_is_absent(priv))
+ return IRQ_NONE;
if (isrc & IRQ_WUI)
netdev_warn(dev, "wakeup interrupt\n");
@@ -508,6 +516,9 @@ irqreturn_t sja1000_interrupt(int irq, void *dev_id)
while (status & SR_RBS) {
sja1000_rx(dev);
status = priv->read_reg(priv, REG_SR);
+ /* check for absent controller */
+ if (status == 0xFF && sja1000_is_absent(priv))
+ return IRQ_NONE;
}
}
if (isrc & (IRQ_DOI | IRQ_EI | IRQ_BEI | IRQ_EPI | IRQ_ALI)) {
OpenPOWER on IntegriCloud