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| author | Gavin Shan <shangw@linux.vnet.ibm.com> | 2013-07-24 10:25:00 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-07-24 14:18:49 +1000 |
| commit | 91150af3adf67463c4ca7d72d4fe1a84da37792c (patch) | |
| tree | 8a77a60b8439ee9ffd1c2d270cdeb394e448ee96 | |
| parent | 4b83bd452f17582c8d1c916568fd28a237a2eb46 (diff) | |
| download | linux-stable-91150af3adf67463c4ca7d72d4fe1a84da37792c.tar.gz linux-stable-91150af3adf67463c4ca7d72d4fe1a84da37792c.tar.bz2 linux-stable-91150af3adf67463c4ca7d72d4fe1a84da37792c.zip | |
powerpc/eeh: Fix unbalanced enable for IRQ
The patch fixes following issue:
Unbalanced enable for IRQ 23
------------[ cut here ]------------
WARNING: at kernel/irq/manage.c:437
:
NIP [c00000000016de8c] .__enable_irq+0x11c/0x140
LR [c00000000016de88] .__enable_irq+0x118/0x140
Call Trace:
[c000003ea1f23880] [c00000000016de88] .__enable_irq+0x118/0x140 (unreliable)
[c000003ea1f23910] [c00000000016df08] .enable_irq+0x58/0xa0
[c000003ea1f239a0] [c0000000000388b4] .eeh_enable_irq+0xc4/0xe0
[c000003ea1f23a30] [c000000000038a28] .eeh_report_reset+0x78/0x130
[c000003ea1f23ac0] [c000000000037508] .eeh_pe_dev_traverse+0x98/0x170
[c000003ea1f23b60] [c0000000000391ac] .eeh_handle_normal_event+0x2fc/0x3d0
[c000003ea1f23bf0] [c000000000039538] .eeh_handle_event+0x2b8/0x2c0
[c000003ea1f23c90] [c000000000039600] .eeh_event_handler+0xc0/0x170
[c000003ea1f23d30] [c0000000000da9a0] .kthread+0xf0/0x100
[c000003ea1f23e30] [c00000000000a1dc] .ret_from_kernel_thread+0x5c/0x80
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/eeh_driver.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index 9fda75d1f5aa..36bed5a12750 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -143,10 +143,14 @@ static void eeh_disable_irq(struct pci_dev *dev) static void eeh_enable_irq(struct pci_dev *dev) { struct eeh_dev *edev = pci_dev_to_eeh_dev(dev); + struct irq_desc *desc; if ((edev->mode) & EEH_DEV_IRQ_DISABLED) { edev->mode &= ~EEH_DEV_IRQ_DISABLED; - enable_irq(dev->irq); + + desc = irq_to_desc(dev->irq); + if (desc && desc->depth > 0) + enable_irq(dev->irq); } } |