27 lines
897 B
Diff
27 lines
897 B
Diff
Subject: pci: Use __wake_up_all_locked in 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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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9-rt1.tar.xz
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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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---
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drivers/pci/access.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/pci/access.c
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+++ b/drivers/pci/access.c
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@@ -672,7 +672,7 @@ void pci_cfg_access_unlock(struct pci_de
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WARN_ON(!dev->block_cfg_access);
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dev->block_cfg_access = 0;
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- wake_up_all(&pci_cfg_wait);
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+ wake_up_all_locked(&pci_cfg_wait);
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raw_spin_unlock_irqrestore(&pci_lock, flags);
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}
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EXPORT_SYMBOL_GPL(pci_cfg_access_unlock);
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