diff mbox series

[net-next,6/7] bnxt_en: Remove the read of BNXT_FW_RESET_INPROG_REG after firmware reset.

Message ID 1616396925-16596-7-git-send-email-michael.chan@broadcom.com (mailing list archive)
State Accepted
Commit bae8a00379f4c1327c8e38a768083460b5ad5b12
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: Error recovery improvements. | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net-next
netdev/subject_prefix success Link
netdev/cc_maintainers success CCed 4 of 4 maintainers
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 39 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link

Commit Message

Michael Chan March 22, 2021, 7:08 a.m. UTC 
From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>

Once the chip goes through reset, the register mapping may be lost
and any read of the mapped health registers may return garbage value
until the registers are mapped again in the init path.

Reading BNXT_FW_RESET_INPROG_REG after firmware reset will likely
return garbage value due to the above reason.  Reading this register
is for information purpose only so remove it.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 31 ++++++++---------------
 1 file changed, 11 insertions(+), 20 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index edbe5982cf41..6db5e927a473 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11769,28 +11769,19 @@  static void bnxt_fw_reset_task(struct work_struct *work)
 		return;
 	case BNXT_FW_RESET_STATE_ENABLE_DEV:
 		bnxt_inv_fw_health_reg(bp);
-		if (test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state)) {
-			u32 val;
-
-			if (!bp->fw_reset_min_dsecs) {
-				u16 val;
-
-				pci_read_config_word(bp->pdev, PCI_SUBSYSTEM_ID,
-						     &val);
-				if (val == 0xffff) {
-					if (bnxt_fw_reset_timeout(bp)) {
-						netdev_err(bp->dev, "Firmware reset aborted, PCI config space invalid\n");
-						goto fw_reset_abort;
-					}
-					bnxt_queue_fw_reset_work(bp, HZ / 1000);
-					return;
+		if (test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state) &&
+		    !bp->fw_reset_min_dsecs) {
+			u16 val;
+
+			pci_read_config_word(bp->pdev, PCI_SUBSYSTEM_ID, &val);
+			if (val == 0xffff) {
+				if (bnxt_fw_reset_timeout(bp)) {
+					netdev_err(bp->dev, "Firmware reset aborted, PCI config space invalid\n");
+					goto fw_reset_abort;
 				}
+				bnxt_queue_fw_reset_work(bp, HZ / 1000);
+				return;
 			}
-			val = bnxt_fw_health_readl(bp,
-						   BNXT_FW_RESET_INPROG_REG);
-			if (val)
-				netdev_warn(bp->dev, "FW reset inprog %x after min wait time.\n",
-					    val);
 		}
 		clear_bit(BNXT_STATE_FW_FATAL_COND, &bp->state);
 		if (pci_enable_device(bp->pdev)) {