4.14-stable review patch. If anyone has any objections, please let me know.
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From: Xiubo Li xiubli@redhat.com
commit 3d27c4de8d4fb2d4099ff324671792aa2578c6f9 upstream.
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 Signed-off-by: Tommi Rantala tommi.t.rantala@nokia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/uio/uio.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
--- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -445,13 +445,10 @@ static irqreturn_t uio_interrupt(int irq 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; }
@@ -974,9 +971,8 @@ int __uio_register_device(struct module * 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) { info->uio_dev = NULL; goto err_request_irq;