4.9-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@oracle.com
[ 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@oracle.com Acked-by: Frederic Barrat fbarrat@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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; }