[PATCH 1/3] net/iavf: downgrade opcode 0 ARQ log to debug

[Ciara Loftus]

From: Talluri Chaitanyababu <chaitanyababux.talluri at intel.com>

After admin queue reinitialisation, completions from uninitialised
ARQ ring descriptor memory may arrive before any real PF response.
These carry opcode 0 (`VIRTCHNL_OP_UNKNOWN`) and trigger a WARNING
log on every poll iteration, flooding the log during reset recovery.

Treat opcode 0 as a distinct case and log it at DEBUG level, while
retaining WARNING for genuine opcode mismatches.

Signed-off-by: Talluri Chaitanyababu <chaitanyababux.talluri at intel.com>
---
 drivers/net/intel/iavf/iavf_vchnl.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/intel/iavf/iavf_vchnl.c b/drivers/net/intel/iavf/iavf_vchnl.c
index 94ccfb5d6e..cd90d35023 100644
--- a/drivers/net/intel/iavf/iavf_vchnl.c
+++ b/drivers/net/intel/iavf/iavf_vchnl.c
@@ -299,8 +299,15 @@ iavf_read_msg_from_pf(struct iavf_adapter *adapter, uint16_t buf_len,
 		/* async reply msg on command issued by vf previously */
 		result = IAVF_MSG_CMD;
 		if (opcode != vf->pend_cmd) {
-			PMD_DRV_LOG(WARNING, "command mismatch, expect %u, get %u",
-					vf->pend_cmd, opcode);
+			if (opcode == VIRTCHNL_OP_UNKNOWN)
+				PMD_DRV_LOG(DEBUG,
+					    "Spurious msg with opcode 0, pending cmd %u",
+					    vf->pend_cmd);
+			else
+				PMD_DRV_LOG(WARNING,
+					    "command mismatch, expect %u, get %u",
+					    vf->pend_cmd, opcode);
+
 			result = IAVF_MSG_ERR;
 		}
 	}
-- 
2.43.0