bnxt_en: Wait for FLR to complete during probe

[ Upstream commit 3c1069fa42872f95cf3c6fedf80723d391e12d57 ]

The first message to firmware may fail if the device is undergoing FLR.
The driver has some recovery logic for this failure scenario but we must
wait 100 msec for FLR to complete before proceeding.  Otherwise the
recovery will always fail.

Fixes: ba02629ff6cb ("bnxt_en: log firmware status on firmware init failure")
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240117234515.226944-2-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 6039886..9e04db1 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12261,6 +12261,11 @@ static int bnxt_fw_init_one_p1(struct bnxt *bp)
 
        bp->fw_cap = 0;
        rc = bnxt_hwrm_ver_get(bp);
+       /* FW may be unresponsive after FLR. FLR must complete within 100 msec
+        * so wait before continuing with recovery.
+        */
+       if (rc)
+               msleep(100);
        bnxt_try_map_fw_health_reg(bp);
        if (rc) {
                rc = bnxt_try_recover_fw(bp);