xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mei: fix mei_poll operation

Browse Source 
mei_poll returned with POLLIN w/o checking whether the operation
has really completed.
remove redundant check and locking in amthif specific handler

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2015-03-27 00:27:57 +02:00
committed by Greg Kroah-Hartman
parent e1c0d82dab
commit 1d9013f092
3 changed files with 27 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/misc/mei/main.c
View File

@@ -542,6 +542,7 @@ static long mei_compat_ioctl(struct file *file,
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
unsigned long req_events = poll_requested_events(wait);
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
@@ -558,22 +559,19 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
goto out;
}
mutex_unlock(&dev->device_lock);
if (cl == &dev->iamthif_cl)
return mei_amthif_poll(dev, file, wait);
poll_wait(file, &cl->tx_wait, wait);
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
mask = POLLERR;
if (cl == &dev->iamthif_cl) {
mask = mei_amthif_poll(dev, file, wait);
goto out;
}
mask |= (POLLIN | POLLRDNORM);
if (req_events & (POLLIN | POLLRDNORM)) {
poll_wait(file, &cl->rx_wait, wait);
if (!list_empty(&cl->rd_completed))
mask |= POLLIN | POLLRDNORM;
else
mei_cl_read_start(cl, 0, file);
}
out:
mutex_unlock(&dev->device_lock);