From 282edcece39e08d02c22492d593e4b9b94a65dff Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Thu, 17 Nov 2011 14:37:35 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/sky2.c | 17 ++++++++++------- drivers/net/ethernet/marvell/sky2.h | 1 + 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index d9968717770..7803efa46eb 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 0af31b8b5f1..ff6f58bf822 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; -- 2.20.1