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sky2: fix hang on shutdown (and other irq issues)

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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>
This commit is contained in:
stephen hemminger 2011-11-16 13:42:55 +00:00 committed by David S. Miller
parent bbc13ab9d2
commit 1401a8008a
1 changed files with 27 additions and 18 deletions
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45
drivers/net/ethernet/marvell/sky2.c
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@ -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)