Revert "uio: use request_threaded_irq instead"

Since mutex lock in irq hanler is useless currently, here will
remove it together with it.

This reverts commit 9421e45f5ff3d558cf8b75a8cc0824530caf3453.

Reported-by: james.r.harris@intel.com
CC: Ahsan Atta <ahsan.atta@intel.com>
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 5d421d7..d7fb493 100644 (file)
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -443,13 +443,10 @@ static irqreturn_t uio_interrupt(int irq, void *dev_id)
        struct uio_device *idev = (struct uio_device *)dev_id;
        irqreturn_t ret;
 
-       mutex_lock(&idev->info_lock);
-
        ret = idev->info->handler(irq, idev->info);
        if (ret == IRQ_HANDLED)
                uio_event_notify(idev->info);
 
-       mutex_unlock(&idev->info_lock);
        return ret;
 }
 
@@ -969,9 +966,8 @@ int __uio_register_device(struct module *owner,
                 * FDs at the time of unregister and therefore may not be
                 * freed until they are released.
                 */
-               ret = request_threaded_irq(info->irq, NULL, uio_interrupt,
-                                          info->irq_flags, info->name, idev);
-
+               ret = request_irq(info->irq, uio_interrupt,
+                                 info->irq_flags, info->name, idev);
                if (ret)
                        goto err_request_irq;
        }