Subject: Re: [PATCH] mwifiex: Do not use GFP_KERNEL in atomic context

From: Kalle Valo <[email-masked]>
Date: Tue, 18 Aug 2020 12:52:28 +0000 (UTC)

Christophe JAILLET <[email-masked]> wrote:

> A possible call chain is as follow:
>   mwifiex_sdio_interrupt                            (sdio.c)
>     --> mwifiex_main_process                        (main.c)
>       --> mwifiex_process_cmdresp                   (cmdevt.c)
>         --> mwifiex_process_sta_cmdresp             (sta_cmdresp.c)
>           --> mwifiex_ret_802_11_scan               (scan.c)
>             --> mwifiex_parse_single_response_buf   (scan.c)
> 
> 'mwifiex_sdio_interrupt()' is an interrupt function.
> 
> Also note that 'mwifiex_ret_802_11_scan()' already uses GFP_ATOMIC.
> 
> So use GFP_ATOMIC instead of GFP_KERNEL when memory is allocated in
> 'mwifiex_parse_single_response_buf()'.
> 
> Fixes: 7c6fa2a843c5 ("mwifiex: use cfg80211 dynamic scan table and cfg80211_get_bss API")
> or
> Fixes: 601216e12c65e ("mwifiex: process RX packets in SDIO IRQ thread directly")
> Signed-off-by: Christophe JAILLET <[email-masked]>

Patch applied to wireless-drivers-next.git, thanks.

d2ab7f00f432 mwifiex: Do not use GFP_KERNEL in atomic context

-- 
https://patchwork.kernel.org/patch/11706587/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches