[PATCH] vdpa/octeon_ep: Fix error code in octep_process_mbox()

[Dan Carpenter]

Return -EINVAL for invalid signatures.  Don't return success.

Fixes: 8b6c724cdab8 ("virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
Nag mode: When we add a new driver, then could we use the patch prefix for the
driver not for the subsystem only.

 BAD: net: add driver for abc123
GOOD: net/abc123: add driver for abc123

 drivers/vdpa/octeon_ep/octep_vdpa_hw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vdpa/octeon_ep/octep_vdpa_hw.c b/drivers/vdpa/octeon_ep/octep_vdpa_hw.c
index 7fa0491bb201..11bd76ae18cf 100644
--- a/drivers/vdpa/octeon_ep/octep_vdpa_hw.c
+++ b/drivers/vdpa/octeon_ep/octep_vdpa_hw.c
@@ -140,7 +140,7 @@ static int octep_process_mbox(struct octep_hw *oct_hw, u16 id, u16 qid, void *bu
 	val = octep_read_sig(mbox);
 	if ((val & 0xFFFF) != MBOX_RSP_SIG) {
 		dev_warn(&pdev->dev, "Invalid Signature from mbox : %d response\n", id);
-		return ret;
+		return -EINVAL;
 	}
 
 	val = octep_read_sts(mbox);
-- 
2.43.0