patches/pci-access-use-__wake_up_all_locked.patch

Subject: pci: Use __wake_up_all_locked pci_unblock_user_cfg_access()
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 01 Dec 2011 00:07:16 +0100

The waitqueue is protected by the pci_lock, so we can just avoid to
lock the waitqueue lock itself. That prevents the
might_sleep()/scheduling while atomic problem on RT

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
---
 drivers/pci/access.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -465,7 +465,7 @@ void pci_cfg_access_unlock(struct pci_de
 	WARN_ON(!dev->block_cfg_access);
 
 	dev->block_cfg_access = 0;
-	wake_up_all(&pci_cfg_wait);
+	wake_up_all_locked(&pci_cfg_wait);
 	raw_spin_unlock_irqrestore(&pci_lock, flags);
 }
 EXPORT_SYMBOL_GPL(pci_cfg_access_unlock);