4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit 58d876fa7181f2f393190c1d32c056b5a9d34aa2 ]
We should unlock if get_cxl_adapter() fails.
Fixes: 594ff7d067ca ("cxl: Support to flash a new image on the adapter from a guest")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/misc/cxl/flash.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/misc/cxl/flash.c
+++ b/drivers/misc/cxl/flash.c
@@ -401,8 +401,10 @@ static int device_open(struct inode *ino
if (down_interruptible(&sem) != 0)
return -EPERM;
- if (!(adapter = get_cxl_adapter(adapter_num)))
- return -ENODEV;
+ if (!(adapter = get_cxl_adapter(adapter_num))) {
+ rc = -ENODEV;
+ goto err_unlock;
+ }
file->private_data = adapter;
continue_token = 0;
@@ -446,6 +448,8 @@ err1:
free_page((unsigned long) le);
err:
put_device(&adapter->dev);
+err_unlock:
+ up(&sem);
return rc;
}