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authorstephen hemminger <shemminger@vyatta.com>2011-11-17 14:37:35 +0000
committerDavid S. Miller <davem@davemloft.net>2011-11-17 21:43:57 -0500
commit282edcece39e08d02c22492d593e4b9b94a65dff (patch)
treea0d0c9816a5ef76bc637a573e382379600016e09 /drivers/net
parentsky2: enforce minimum ring size (diff)
downloadlinux-dev-282edcece39e08d02c22492d593e4b9b94a65dff.tar.xz
linux-dev-282edcece39e08d02c22492d593e4b9b94a65dff.zip
sky2: fix hang in napi_disable
If IRQ was never initialized, then calling napi_disable() would hang. Add more bookkeeping to track whether IRQ was ever initialized. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/marvell/sky2.c17
-rw-r--r--drivers/net/ethernet/marvell/sky2.h1
2 files changed, 11 insertions, 7 deletions
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index d99687177704..7803efa46eb2 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1723,6 +1723,8 @@ static int sky2_setup_irq(struct sky2_hw *hw, const char *name)
if (err)
dev_err(&pdev->dev, "cannot assign irq %d\n", pdev->irq);
else {
+ hw->flags |= SKY2_HW_IRQ_SETUP;
+
napi_enable(&hw->napi);
sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
sky2_read32(hw, B0_IMSK);
@@ -2120,6 +2122,7 @@ static int sky2_close(struct net_device *dev)
napi_disable(&hw->napi);
free_irq(hw->pdev->irq, hw);
+ hw->flags &= ~SKY2_HW_IRQ_SETUP;
} else {
u32 imask;
@@ -3423,12 +3426,13 @@ static void sky2_all_down(struct sky2_hw *hw)
{
int i;
- sky2_read32(hw, B0_IMSK);
- sky2_write32(hw, B0_IMSK, 0);
+ if (hw->flags & SKY2_HW_IRQ_SETUP) {
+ sky2_read32(hw, B0_IMSK);
+ sky2_write32(hw, B0_IMSK, 0);
- if (hw->ports > 1 || netif_running(hw->dev[0]))
synchronize_irq(hw->pdev->irq);
- napi_disable(&hw->napi);
+ napi_disable(&hw->napi);
+ }
for (i = 0; i < hw->ports; i++) {
struct net_device *dev = hw->dev[i];
@@ -3445,7 +3449,7 @@ static void sky2_all_down(struct sky2_hw *hw)
static void sky2_all_up(struct sky2_hw *hw)
{
- u32 imask = 0;
+ u32 imask = Y2_IS_BASE;
int i;
for (i = 0; i < hw->ports; i++) {
@@ -3461,8 +3465,7 @@ static void sky2_all_up(struct sky2_hw *hw)
netif_wake_queue(dev);
}
- if (imask || hw->ports > 1) {
- imask |= Y2_IS_BASE;
+ if (hw->flags & SKY2_HW_IRQ_SETUP) {
sky2_write32(hw, B0_IMSK, imask);
sky2_read32(hw, B0_IMSK);
sky2_read32(hw, B0_Y2_SP_LISR);
diff --git a/drivers/net/ethernet/marvell/sky2.h b/drivers/net/ethernet/marvell/sky2.h
index 0af31b8b5f10..ff6f58bf822a 100644
--- a/drivers/net/ethernet/marvell/sky2.h
+++ b/drivers/net/ethernet/marvell/sky2.h
@@ -2287,6 +2287,7 @@ struct sky2_hw {
#define SKY2_HW_RSS_BROKEN 0x00000100
#define SKY2_HW_VLAN_BROKEN 0x00000200
#define SKY2_HW_RSS_CHKSUM 0x00000400 /* RSS requires chksum */
+#define SKY2_HW_IRQ_SETUP 0x00000800
u8 chip_id;
u8 chip_rev;