From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org
Subject: [PATCH net 2/2] bnxt_en: Wait longer for the firmware message response to complete.
Date: Wed, 20 Feb 2019 19:07:32 -0500 [thread overview]
Message-ID: <1550707652-14747-3-git-send-email-michael.chan@broadcom.com> (raw)
In-Reply-To: <1550707652-14747-1-git-send-email-michael.chan@broadcom.com>
The code waits up to 20 usec for the firmware response to complete
once we've seen the valid response header in the buffer. It turns
out that in some scenarios, this wait time is not long enough.
Extend it to 150 usec and use usleep_range() instead of udelay().
Fixes: 9751e8e71487 ("bnxt_en: reduce timeout on initial HWRM calls")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 1ddd672..d95730c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -3926,7 +3926,7 @@ static int bnxt_hwrm_do_send_msg(struct bnxt *bp, void *msg, u32 msg_len,
dma_rmb();
if (*valid)
break;
- udelay(1);
+ usleep_range(1, 5);
}
if (j >= HWRM_VALID_BIT_DELAY_USEC) {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index a451796..2fb653e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -582,7 +582,7 @@ struct nqe_cn {
(HWRM_SHORT_TIMEOUT_COUNTER * HWRM_SHORT_MIN_TIMEOUT + \
((n) - HWRM_SHORT_TIMEOUT_COUNTER) * HWRM_MIN_TIMEOUT))
-#define HWRM_VALID_BIT_DELAY_USEC 20
+#define HWRM_VALID_BIT_DELAY_USEC 150
#define BNXT_HWRM_CHNL_CHIMP 0
#define BNXT_HWRM_CHNL_KONG 1
--
2.5.1
next prev parent reply other threads:[~2019-02-21 0:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 0:07 [PATCH net 0/2] bnxt_en: firmware message delay fixes Michael Chan
2019-02-21 0:07 ` [PATCH net 1/2] bnxt_en: Fix typo in firmware message timeout logic Michael Chan
2019-02-21 0:07 ` Michael Chan [this message]
2019-02-22 23:21 ` [PATCH net 0/2] bnxt_en: firmware message delay fixes David Miller
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