diff mbox series

[net-next,15/15] bnxt_en: Do not process completion entries after fatal condition detected.

Message ID 1611558501-11022-16-git-send-email-michael.chan@broadcom.com (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: Error recovery improvements. | expand

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netdev/stable success Stable not CCed

Commit Message

Michael Chan Jan. 25, 2021, 7:08 a.m. UTC 
Once the firmware fatal condition is detected, we should cease
comminication with the firmware and hardware quickly even if there
are many completion entries in the completion rings.  This will
speed up the recovery process and prevent further I/Os that may
cause further exceptions.

Do not proceed in the NAPI poll function if fatal condition is
detected.  Call napi_complete() and return without arming interrupts.
Cleanup of all rings and reset are imminent.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 221f5437884b..dd7d2caa57a2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2405,6 +2405,10 @@  static int bnxt_poll(struct napi_struct *napi, int budget)
 	struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
 	int work_done = 0;
 
+	if (unlikely(test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state))) {
+		napi_complete(napi);
+		return 0;
+	}
 	while (1) {
 		work_done += bnxt_poll_work(bp, cpr, budget - work_done);
 
@@ -2479,6 +2483,10 @@  static int bnxt_poll_p5(struct napi_struct *napi, int budget)
 	int work_done = 0;
 	u32 cons;
 
+	if (unlikely(test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state))) {
+		napi_complete(napi);
+		return 0;
+	}
 	if (cpr->has_more_work) {
 		cpr->has_more_work = 0;
 		work_done = __bnxt_poll_cqs(bp, bnapi, budget);