[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.carpen...@linaro.org>
---
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