Re: [dpdk-dev] [PATCH] net/bnxt: fix to prevent device access in error state

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

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On Sun, May 2, 2021 at 10:00 PM Kalesh A P <
kalesh-anakkur.purayil@broadcom.com> wrote:

> From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
>
> Driver should prevent any DMA with the device when it
> detects an error. When firmware is in fatal state,
> stop tx/rx by assigning them to dummy functions.
>
> Fixes: be14720def9c ("net/bnxt: support FW reset")
> Fixes: 9d0cbaecc91a ("net/bnxt: support periodic FW health monitoring")
> Cc: stable@dpdk.org
>
> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
> Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
>
Patch applied to dpdk-next-net-brcm. Thanks


> ---
>  drivers/net/bnxt/bnxt_ethdev.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/net/bnxt/bnxt_ethdev.c
> b/drivers/net/bnxt/bnxt_ethdev.c
> index 719eb68..822853a 100644
> --- a/drivers/net/bnxt/bnxt_ethdev.c
> +++ b/drivers/net/bnxt/bnxt_ethdev.c
> @@ -4275,6 +4275,8 @@ static void bnxt_check_fw_health(void *arg)
>         bp->flags |= BNXT_FLAG_FATAL_ERROR;
>         bp->flags |= BNXT_FLAG_FW_RESET;
>
> +       bnxt_stop_rxtx(bp);
> +
>         PMD_DRV_LOG(ERR, "Detected FW dead condition\n");
>
>         if (bnxt_is_master_func(bp))
> --
> 2.10.1
>
>