diff mbox

[net,6/6] bnx2x: handle known but unsupported VF messages

Message ID 1379920375-10303-7-git-send-email-yuvalmin@broadcom.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Yuval Mintz Sept. 23, 2013, 7:12 a.m. UTC 
From: Ariel Elior <ariele@broadcom.com>

Commit b9871bcf "bnx2x: VF RSS support - PF side" has deprecated one of
the previous existing messages. If an old VF driver were to send this message
to the PF then the PF will not reply and leave the mailbox in an unsteady
state (and cause a timeout on the VF side).

Wait until firmware ack is written before unlocking channel

Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c | 50 ++++++++++++------------
 1 file changed, 24 insertions(+), 26 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c
index 6cfb887..da16953 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c
@@ -1765,28 +1765,28 @@  static void bnx2x_vf_mbx_request(struct bnx2x *bp, struct bnx2x_virtf *vf,
 		switch (mbx->first_tlv.tl.type) {
 		case CHANNEL_TLV_ACQUIRE:
 			bnx2x_vf_mbx_acquire(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_INIT:
 			bnx2x_vf_mbx_init_vf(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_SETUP_Q:
 			bnx2x_vf_mbx_setup_q(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_SET_Q_FILTERS:
 			bnx2x_vf_mbx_set_q_filters(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_TEARDOWN_Q:
 			bnx2x_vf_mbx_teardown_q(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_CLOSE:
 			bnx2x_vf_mbx_close_vf(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_RELEASE:
 			bnx2x_vf_mbx_release_vf(bp, vf, mbx);
-			break;
+			return;
 		case CHANNEL_TLV_UPDATE_RSS:
 			bnx2x_vf_mbx_update_rss(bp, vf, mbx);
-			break;
+			return;
 		}
 
 	} else {
@@ -1802,26 +1802,24 @@  static void bnx2x_vf_mbx_request(struct bnx2x *bp, struct bnx2x_virtf *vf,
 		for (i = 0; i < 20; i++)
 			DP_CONT(BNX2X_MSG_IOV, "%x ",
 				mbx->msg->req.tlv_buf_size.tlv_buffer[i]);
+	}
 
-		/* test whether we can respond to the VF (do we have an address
-		 * for it?)
-		 */
-		if (vf->state == VF_ACQUIRED || vf->state == VF_ENABLED) {
-			/* mbx_resp uses the op_rc of the VF */
-			vf->op_rc = PFVF_STATUS_NOT_SUPPORTED;
+	/* can we respond to VF (do we have an address for it?) */
+	if (vf->state == VF_ACQUIRED || vf->state == VF_ENABLED) {
+		/* mbx_resp uses the op_rc of the VF */
+		vf->op_rc = PFVF_STATUS_NOT_SUPPORTED;
 
-			/* notify the VF that we do not support this request */
-			bnx2x_vf_mbx_resp(bp, vf);
-		} else {
-			/* can't send a response since this VF is unknown to us
-			 * just ack the FW to release the mailbox and unlock
-			 * the channel.
-			 */
-			storm_memset_vf_mbx_ack(bp, vf->abs_vfid);
-			mmiowb();
-			bnx2x_unlock_vf_pf_channel(bp, vf,
-						   mbx->first_tlv.tl.type);
-		}
+		/* notify the VF that we do not support this request */
+		bnx2x_vf_mbx_resp(bp, vf);
+	} else {
+		/* can't send a response since this VF is unknown to us
+		 * just ack the FW to release the mailbox and unlock
+		 * the channel.
+		 */
+		storm_memset_vf_mbx_ack(bp, vf->abs_vfid);
+		/* Firmware ack should be written before unlocking channel */
+		mmiowb();
+		bnx2x_unlock_vf_pf_channel(bp, vf, mbx->first_tlv.tl.type);
 	}
 }