[PATCH 6.1.y 1/3] ice: remove unused buffer copy code in ice_sq_send_cmd_retry()

[Sasha Levin <sashal@kernel.org>]

From: Michal Schmidt <mschmidt@redhat.com>

[ Upstream commit 43a630e37e259fee83ab3fd769c42e2fed97ca81 ]

The 'buf_cpy'-related code in ice_sq_send_cmd_retry() looks broken.
'buf' is nowhere copied into 'buf_cpy'.

The reason this does not cause problems is that all commands for which
'is_cmd_for_retry' is true go with a NULL buf.

Let's remove 'buf_cpy'. Add a WARN_ON in case the assumption no longer
holds in the future.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Sunitha Mekala <sunithax.d.mekala@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Stable-dep-of: 326256c0a72d ("ice: reintroduce retry mechanism for indirect AQ")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/intel/ice/ice_common.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 419052ebc3ae7..55a08fa1bf348 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -1595,7 +1595,6 @@ ice_sq_send_cmd_retry(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 {
 	struct ice_aq_desc desc_cpy;
 	bool is_cmd_for_retry;
-	u8 *buf_cpy = NULL;
 	u8 idx = 0;
 	u16 opcode;
 	int status;
@@ -1605,11 +1604,8 @@ ice_sq_send_cmd_retry(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 	memset(&desc_cpy, 0, sizeof(desc_cpy));
 
 	if (is_cmd_for_retry) {
-		if (buf) {
-			buf_cpy = kzalloc(buf_size, GFP_KERNEL);
-			if (!buf_cpy)
-				return -ENOMEM;
-		}
+		/* All retryable cmds are direct, without buf. */
+		WARN_ON(buf);
 
 		memcpy(&desc_cpy, desc, sizeof(desc_cpy));
 	}
@@ -1621,17 +1617,12 @@ ice_sq_send_cmd_retry(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 		    hw->adminq.sq_last_status != ICE_AQ_RC_EBUSY)
 			break;
 
-		if (buf_cpy)
-			memcpy(buf, buf_cpy, buf_size);
-
 		memcpy(desc, &desc_cpy, sizeof(desc_cpy));
 
 		mdelay(ICE_SQ_SEND_DELAY_TIME_MS);
 
 	} while (++idx < ICE_SQ_SEND_MAX_EXECUTE);
 
-	kfree(buf_cpy);
-
 	return status;
 }
 
-- 
2.51.0