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authorstephen hemminger <shemminger@vyatta.com>2011-11-16 13:42:55 +0000
committerDavid S. Miller <davem@davemloft.net>2011-11-16 20:27:08 -0500
commit1401a8008a09e079236261be37e98847c799760a (patch)
tree5ab8aadb5add5b196b46ee075979d68eab9c42fe /drivers
parentbbc13ab9d26f4ff675775dd7dc24d5cae17b85d5 (diff)
sky2: fix hang on shutdown (and other irq issues)
There are several problems with recent change to how IRQ's are setup. * synchronize_irq in sky2_shutdown would hang because there was no IRQ setup. * when device was set to down, some IRQ bits left enabled so a hardware error would produce IRQ with no handler * quick link on Optima chip set was enabled without handler * suspend/resume would leave IRQ on with no handler if device was down Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/marvell/sky2.c45
1 files changed, 27 insertions, 18 deletions
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index fdc6c394c683..f9c4529299bd 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1747,6 +1747,11 @@ static int sky2_up(struct net_device *dev)
sky2_hw_up(sky2);
+ if (hw->chip_id == CHIP_ID_YUKON_OPT ||
+ hw->chip_id == CHIP_ID_YUKON_PRM ||
+ hw->chip_id == CHIP_ID_YUKON_OP_2)
+ imask |= Y2_IS_PHY_QLNK; /* enable PHY Quick Link */
+
/* Enable interrupts from phy/mac for port */
imask = sky2_read32(hw, B0_IMSK);
imask |= portirq_msk[port];
@@ -2101,15 +2106,21 @@ static int sky2_down(struct net_device *dev)
netif_info(sky2, ifdown, dev, "disabling interface\n");
- /* Disable port IRQ */
- sky2_write32(hw, B0_IMSK,
- sky2_read32(hw, B0_IMSK) & ~portirq_msk[sky2->port]);
- sky2_read32(hw, B0_IMSK);
-
if (hw->ports == 1) {
+ sky2_write32(hw, B0_IMSK, 0);
+ sky2_read32(hw, B0_IMSK);
+
napi_disable(&hw->napi);
free_irq(hw->pdev->irq, hw);
} else {
+ u32 imask;
+
+ /* Disable port IRQ */
+ imask = sky2_read32(hw, B0_IMSK);
+ imask &= ~portirq_msk[sky2->port];
+ sky2_write32(hw, B0_IMSK, imask);
+ sky2_read32(hw, B0_IMSK);
+
synchronize_irq(hw->pdev->irq);
napi_synchronize(&hw->napi);
}
@@ -3258,7 +3269,6 @@ static void sky2_reset(struct sky2_hw *hw)
hw->chip_id == CHIP_ID_YUKON_PRM ||
hw->chip_id == CHIP_ID_YUKON_OP_2) {
u16 reg;
- u32 msk;
if (hw->chip_id == CHIP_ID_YUKON_OPT && hw->chip_rev == 0) {
/* disable PCI-E PHY power down (set PHY reg 0x80, bit 7 */
@@ -3281,11 +3291,6 @@ static void sky2_reset(struct sky2_hw *hw)
sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
sky2_pci_write16(hw, PSM_CONFIG_REG4, reg);
- /* enable PHY Quick Link */
- msk = sky2_read32(hw, B0_IMSK);
- msk |= Y2_IS_PHY_QLNK;
- sky2_write32(hw, B0_IMSK, msk);
-
/* check if PSMv2 was running before */
reg = sky2_pci_read16(hw, PSM_CONFIG_REG3);
if (reg & PCI_EXP_LNKCTL_ASPMC)
@@ -3412,7 +3417,9 @@ static void sky2_all_down(struct sky2_hw *hw)
sky2_read32(hw, B0_IMSK);
sky2_write32(hw, B0_IMSK, 0);
- synchronize_irq(hw->pdev->irq);
+
+ if (hw->ports > 1 || netif_running(hw->dev[0]))
+ synchronize_irq(hw->pdev->irq);
napi_disable(&hw->napi);
for (i = 0; i < hw->ports; i++) {
@@ -3430,7 +3437,7 @@ static void sky2_all_down(struct sky2_hw *hw)
static void sky2_all_up(struct sky2_hw *hw)
{
- u32 imask = Y2_IS_BASE;
+ u32 imask = 0;
int i;
for (i = 0; i < hw->ports; i++) {
@@ -3446,11 +3453,13 @@ static void sky2_all_up(struct sky2_hw *hw)
netif_wake_queue(dev);
}
- sky2_write32(hw, B0_IMSK, imask);
- sky2_read32(hw, B0_IMSK);
-
- sky2_read32(hw, B0_Y2_SP_LISR);
- napi_enable(&hw->napi);
+ if (imask || hw->ports > 1) {
+ imask |= Y2_IS_BASE;
+ sky2_write32(hw, B0_IMSK, imask);
+ sky2_read32(hw, B0_IMSK);
+ sky2_read32(hw, B0_Y2_SP_LISR);
+ napi_enable(&hw->napi);
+ }
}
static void sky2_restart(struct work_struct *work)