28 lines
967 B
Diff
28 lines
967 B
Diff
Subject: pci: Use __wake_up_all_locked pci_unblock_user_cfg_access()
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Thu, 01 Dec 2011 00:07:16 +0100
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The waitqueue is protected by the pci_lock, so we can just avoid to
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lock the waitqueue lock itself. That prevents the
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might_sleep()/scheduling while atomic problem on RT
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: stable-rt@vger.kernel.org
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---
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drivers/pci/access.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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Index: linux-3.2/drivers/pci/access.c
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===================================================================
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--- linux-3.2.orig/drivers/pci/access.c
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+++ linux-3.2/drivers/pci/access.c
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@@ -441,7 +441,7 @@ void pci_unblock_user_cfg_access(struct
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WARN_ON(!dev->block_ucfg_access);
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dev->block_ucfg_access = 0;
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- wake_up_all(&pci_ucfg_wait);
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+ wake_up_all_locked(&pci_ucfg_wait);
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raw_spin_unlock_irqrestore(&pci_lock, flags);
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}
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EXPORT_SYMBOL_GPL(pci_unblock_user_cfg_access);
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