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path: root/drivers/misc/mei/main.c
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Diffstat (limited to 'drivers/misc/mei/main.c')
-rw-r--r--drivers/misc/mei/main.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 5e11b5b9b65..173ff095be0 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -625,24 +625,32 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
unsigned int mask = 0;
if (WARN_ON(!cl || !cl->dev))
- return mask;
+ return POLLERR;
dev = cl->dev;
mutex_lock(&dev->device_lock);
- if (dev->dev_state != MEI_DEV_ENABLED)
- goto out;
-
-
- if (cl == &dev->iamthif_cl) {
- mask = mei_amthif_poll(dev, file, wait);
+ if (!mei_cl_is_connected(cl)) {
+ mask = POLLERR;
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;
+ goto out;
+ }
+
if (MEI_WRITE_COMPLETE == cl->writing_state)
mask |= (POLLIN | POLLRDNORM);