diff options
| author | Joe Chou <Joe.Chou@rdc.com.tw> | 2008-12-22 19:40:02 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-24 16:41:43 -0800 |
| commit | 60d6957e08cf40a3d1a2648abd990d6d824d5249 (patch) | |
| tree | f4caf940119694f499f8bb6f58a72d6e6b49f627 | |
| parent | b038d442caddba8021c2ca049470450759f46e3f (diff) | |
r6040: save and restore MIER correctly in the interrupt routine
[ Upstream commit: 3e7c469f07ff14cbf9a814739e1fc99a863e0943 ]
This patch saves the MIER register contents before treating
interrupts, then restores them correcty at the end of the
interrupt routine.
Signed-off-by: Joe Chou <Joe.Chou@rdc.com.tw>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/r6040.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c index c2e8ac12e673..b6ff173398a1 100644 --- a/drivers/net/r6040.c +++ b/drivers/net/r6040.c @@ -681,8 +681,10 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id) struct net_device *dev = dev_id; struct r6040_private *lp = netdev_priv(dev); void __iomem *ioaddr = lp->base; - u16 status; + u16 misr, status; + /* Save MIER */ + misr = ioread16(ioaddr + MIER); /* Mask off RDC MAC interrupt */ iowrite16(MSK_INT, ioaddr + MIER); /* Read MISR status and clear */ @@ -702,7 +704,7 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id) dev->stats.rx_fifo_errors++; /* Mask off RX interrupt */ - iowrite16(ioread16(ioaddr + MIER) & ~RX_INTS, ioaddr + MIER); + misr &= ~RX_INTS; netif_rx_schedule(dev, &lp->napi); } @@ -710,6 +712,9 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id) if (status & TX_INTS) r6040_tx(dev); + /* Restore RDC MAC interrupt */ + iowrite16(misr, ioaddr + MIER); + return IRQ_HANDLED; } |