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bnxt_en: Skip reading PXP registers during ethtool -d if unsupported

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Newer firmware does not allow reading the PXP registers during
ethtool -d, so skip the firmware call in that case.  Userspace
(bnxt.c) always expects the register block to be populated so
zeroes will be returned instead.

Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20241217182620.2454075-6-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Michael Chan
2024-12-17 10:26:19 -08:00
committed by Jakub Kicinski
parent b45a850585
commit bf2afe0f14
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
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@@ -2050,7 +2050,8 @@ static void bnxt_get_regs(struct net_device *dev, struct ethtool_regs *regs,
int rc;
regs->version = 0;
bnxt_dbg_hwrm_rd_reg(bp, 0, BNXT_PXP_REG_LEN / 4, _p);
if (!(bp->fw_dbg_cap & DBG_QCAPS_RESP_FLAGS_REG_ACCESS_RESTRICTED))
bnxt_dbg_hwrm_rd_reg(bp, 0, BNXT_PXP_REG_LEN / 4, _p);
if (!(bp->fw_cap & BNXT_FW_CAP_PCIE_STATS_SUPPORTED))
return;