bnxt_en: Do not initialize PTP on older P3/P4 chips

[ Upstream commit e8b51a1a15d5a3cce231e0669f6a161dc5bb9b75 ]

The driver does not support PTP on these older chips and it is assuming
that firmware on these older chips will not return the
PORT_MAC_PTP_QCFG_RESP_FLAGS_HWRM_ACCESS flag in __bnxt_hwrm_ptp_qcfg(),
causing the function to abort quietly.

But newer firmware now sets this flag and so __bnxt_hwrm_ptp_qcfg()
will proceed further.  Eventually it will fail in bnxt_ptp_init() ->
bnxt_map_ptp_regs() because there is no code to support the older chips.
The driver will then complain:

"PTP initialization failed.\n"

Fix it so that we abort quietly earlier without going through the
unnecessary steps and alarming the user with the warning log.

Fixes: ae5c42f0b92c ("bnxt_en: Get PTP hardware capability from firmware")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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 c6e3660..e3e5a42 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -7597,7 +7597,7 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
        u8 flags;
        int rc;
 
-       if (bp->hwrm_spec_code < 0x10801) {
+       if (bp->hwrm_spec_code < 0x10801 || !BNXT_CHIP_P5_THOR(bp)) {
                rc = -ENODEV;
                goto no_ptp;
        }