linux-kernel - [char-misc-next 18/27] mei: wake blocked write on link reset

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Date:	Sun,  7 Feb 2016 23:35:34 +0200
From:	Tomas Winkler <tomas.winkler@...el.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Alexander Usyskin <alexander.usyskin@...el.com>,
	linux-kernel@...r.kernel.org,
	Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 18/27] mei: wake blocked write on link reset

From: Alexander Usyskin <alexander.usyskin@...el.com>

In case of link reset all blocked writes should be interrupted.
Note, that currently blocking write is used only through bus layer.

Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
 drivers/misc/mei/client.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 3fd070a698ce..5ddc690752c2 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -1691,7 +1691,8 @@ out:
 
 		mutex_unlock(&dev->device_lock);
 		rets = wait_event_interruptible(cl->tx_wait,
-				cl->writing_state == MEI_WRITE_COMPLETE);
+				cl->writing_state == MEI_WRITE_COMPLETE ||
+				(!mei_cl_is_connected(cl)));
 		mutex_lock(&dev->device_lock);
 		/* wait_event_interruptible returns -ERESTARTSYS */
 		if (rets) {
@@ -1699,6 +1700,10 @@ out:
 				rets = -EINTR;
 			goto err;
 		}
+		if (cl->writing_state != MEI_WRITE_COMPLETE) {
+			rets = -EFAULT;
+			goto err;
+		}
 	}
 
 	rets = size;
-- 
2.4.3