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| author | Jakub Kicinski <kuba@kernel.org> | 2023-10-16 20:16:40 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-18 03:50:55 +0300 |
| commit | 73b24e7ce8f1f47e2b73c9b6724188898f4ca6fd (patch) | |
| tree | 0bf185ef67dd5d38ae4112805065a70dad9474cd /drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c | |
| parent | 99e79b677b9a4542260c6244982d0b5d12354983 (diff) | |
| download | linux-73b24e7ce8f1f47e2b73c9b6724188898f4ca6fd.tar.xz | |
eth: bnxt: fix backward compatibility with older devices
Recent FW interface update bumped the size of struct hwrm_func_cfg_input
above 128B which is the max some devices support.
Probe on Stratus (BCM957452) with FW 20.8.3.11 fails with:
bnxt_en ...: Unable to reserve tx rings
bnxt_en ...: 2nd rings reservation failed.
bnxt_en ...: Not enough rings available.
Once probe is fixed other errors pop up:
bnxt_en ...: Failed to set async event completion ring.
This is because __hwrm_send() rejects requests larger than
bp->hwrm_max_ext_req_len with -E2BIG. Since the driver doesn't
actually access any of the new fields, yet, trim the length.
It should be safe.
Similar workaround exists for backing_store_cfg_input.
Although that one mins() to a constant of 256, not 128
we'll effectively use here. Michael explains: "the backing
store cfg command is supported by relatively newer firmware
that will accept 256 bytes at least."
To make debugging easier in the future add a warning
for oversized requests.
Fixes: 754fbf604ff6 ("bnxt_en: Update firmware interface to 1.10.2.171")
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231016171640.1481493-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c index 8b3e7697390f..c3beadc1205b 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c @@ -62,7 +62,7 @@ static int bnxt_hwrm_remote_dev_reset_set(struct bnxt *bp, bool remote_reset) if (~bp->fw_cap & BNXT_FW_CAP_HOT_RESET_IF) return -EOPNOTSUPP; - rc = hwrm_req_init(bp, req, HWRM_FUNC_CFG); + rc = bnxt_hwrm_func_cfg_short_req_init(bp, &req); if (rc) return rc; |