mei: fix return value on disconnection

Tomas Winkler · gregkh · commit 0b7860d6e88c · 2016-12-02T09:09:02.000+01:00
commit 2d4d5481e2d6f93b25fcfb13a9f20bbfbf54266a upstream.

Correct errno on client disconnection is -ENODEV not -EBUSY

Signed-off-by: Tomas Winkler &lt;tomas.winkler@intel.com&gt;
Signed-off-by: Alexander Usyskin &lt;alexander.usyskin@intel.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
@@ -144,7 +144,7 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
 		mutex_lock(&bus->device_lock);
 
 		if (!mei_cl_is_connected(cl)) {
-			rets = -EBUSY;
+			rets = -ENODEV;
 			goto out;
 		}
 	}
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
@@ -207,7 +207,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
 
 		mutex_lock(&dev->device_lock);
 		if (!mei_cl_is_connected(cl)) {
-			rets = -EBUSY;
+			rets = -ENODEV;
 			goto out;
 		}
 	}

Original file line number	Diff line number	Diff line change
`@@ -144,7 +144,7 @@ ssize_t __mei_cl_recv(struct mei_cl cl, u8 buf, size_t length)`
`144`	`144`	`mutex_lock(&bus->device_lock);`
`145`	`145`
`146`	`146`	`if (!mei_cl_is_connected(cl)) {`
`147`		`- rets = -EBUSY;`
	`147`	`+ rets = -ENODEV;`
`148`	`148`	`goto out;`
`149`	`149`	`}`
`150`	`150`	`}`
Original file line number	Diff line number	Diff line change
`@@ -207,7 +207,7 @@ static ssize_t mei_read(struct file file, char __user ubuf,`
`207`	`207`
`208`	`208`	`mutex_lock(&dev->device_lock);`
`209`	`209`	`if (!mei_cl_is_connected(cl)) {`
`210`		`- rets = -EBUSY;`
	`210`	`+ rets = -ENODEV;`
`211`	`211`	`goto out;`
`212`	`212`	`}`
`213`	`213`	`}`