pci: Use __wake_up_all_locked pci_unblock_user_cfg_access()

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index fdaa42aac7c6..1a6cc6730286 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -441,7 +441,7 @@ void pci_unblock_user_cfg_access(struct pci_dev *dev)
 	WARN_ON(!dev->block_ucfg_access);
 
 	dev->block_ucfg_access = 0;
-	wake_up_all(&pci_ucfg_wait);
+	wake_up_all_locked(&pci_ucfg_wait);
 	raw_spin_unlock_irqrestore(&pci_lock, flags);
 }
 EXPORT_SYMBOL_GPL(pci_unblock_user_cfg_access);