From b950ac1dabfcbf97b99f26fa75f86087e1960aef Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 25 Jul 2013 20:15:53 +0300 Subject: mei: don't get stuck in select during reset Clear pending connection after hw reset but before hw start and wake up the waiting task in poll. Signal POLLERR in select when device went through reset. Add wrapper mei_cl_is_connected for checking if the device and client are connected. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/amthif.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'drivers/misc/mei/amthif.c') diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index 749452f8e2f6..d0fdc134068a 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -418,15 +418,23 @@ unsigned int mei_amthif_poll(struct mei_device *dev, struct file *file, poll_table *wait) { unsigned int mask = 0; - mutex_unlock(&dev->device_lock); + poll_wait(file, &dev->iamthif_cl.wait, wait); + mutex_lock(&dev->device_lock); - if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && - dev->iamthif_file_object == file) { + if (!mei_cl_is_connected(&dev->iamthif_cl)) { + + mask = POLLERR; + + } else if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && + dev->iamthif_file_object == file) { + mask |= (POLLIN | POLLRDNORM); dev_dbg(&dev->pdev->dev, "run next amthif cb\n"); mei_amthif_run_next_cmd(dev); } + mutex_unlock(&dev->device_lock); + return mask; } -- cgit v1.2.3