[PATCH V1] accel/amdxdna: Check drmm_mutex_init() return value

[Lizhi Hou]

drmm_mutex_init() may fail and return an error. Check the return value
and abort initialization if mutex creation fails.

Fixes: 8c9ff1b181ba ("accel/amdxdna: Add a new driver for AMD AI Engine")
Signed-off-by: Lizhi Hou <lizhi....@amd.com>
---
 drivers/accel/amdxdna/amdxdna_pci_drv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c 
b/drivers/accel/amdxdna/amdxdna_pci_drv.c
index e94d8290a807..86e9c230875a 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.c
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c
@@ -373,7 +373,10 @@ static int amdxdna_probe(struct pci_dev *pdev, const 
struct pci_device_id *id)
        if (ret)
                return ret;
 
-       drmm_mutex_init(ddev, &xdna->dev_lock);
+       ret = drmm_mutex_init(ddev, &xdna->dev_lock);
+       if (ret)
+               return ret;
+
        init_rwsem(&xdna->notifier_lock);
        INIT_LIST_HEAD(&xdna->client_list);
        pci_set_drvdata(pdev, xdna);
-- 
2.34.1