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

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index d9b64a175990cfc4b9bc93c339ae3270b8dcb025..1d0f6f8d0a54f6404677e8411f9c76afc820da86 100644 (file)
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -521,7 +521,7 @@ void pci_cfg_access_unlock(struct pci_dev *dev)
        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);