From: Brian Norris <briannorris@chromium.org>
To: Amitkumar Karwar <akarwar@marvell.com>
Cc: linux-wireless@vger.kernel.org, Cathy Luo <cluo@marvell.com>,
Nishant Sarmukadam <nishants@marvell.com>
Subject: Re: [PATCH 1/2] mwifiex: fix corner case power save issue
Date: Mon, 24 Oct 2016 16:07:14 -0700 [thread overview]
Message-ID: <20161024230711.GA5323@localhost> (raw)
In-Reply-To: <1477062948-8558-1-git-send-email-akarwar@marvell.com>
Hi,
On Fri, Oct 21, 2016 at 08:45:47PM +0530, Amitkumar Karwar wrote:
> We may get SLEEP event from firmware even if TXDone for last Tx packet
> is still pending. In this case, we may end up accessing PCIe memory for
> handling TXDone after power save handshake is completed. This causes
> kernel crash with external abort.
>
> We will delay sending SLEEP confirm to firmware in
> this case to resolve the problem.
>
> Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
> ---
> drivers/net/wireless/marvell/mwifiex/cmdevt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> index 5347728..f582f61 100644
> --- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> +++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
> @@ -1118,7 +1118,7 @@ mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter)
> void
> mwifiex_check_ps_cond(struct mwifiex_adapter *adapter)
> {
> - if (!adapter->cmd_sent &&
> + if (!adapter->cmd_sent && !adapter->data_sent &&
> !adapter->curr_cmd && !IS_CARD_RX_RCVD(adapter))
> mwifiex_dnld_sleep_confirm_cmd(adapter);
> else
Looks good to me, and tests out on my systems:
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
next prev parent reply other threads:[~2016-10-24 23:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-21 15:15 [PATCH 1/2] mwifiex: fix corner case power save issue Amitkumar Karwar
2016-10-21 15:15 ` [PATCH 2/2] mwifiex: ignore calibration data failure Amitkumar Karwar
2016-11-18 11:11 ` [2/2] " Kalle Valo
2016-10-24 23:07 ` Brian Norris [this message]
2016-11-01 16:41 ` [PATCH 1/2] mwifiex: fix corner case power save issue Amitkumar Karwar
2016-11-17 11:28 ` [1/2] " Kalle Valo
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