linux-kernel - Re: [PATCH] wl1251: dynamically allocate memory used for DMA

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Date:   Fri,  6 May 2022 06:11:52 +0000 (UTC)
From:   Kalle Valo <kvalo@...nel.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     arnd@...db.de, tony@...mide.com,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org,
        kernel@...a-handheld.com, linux-omap@...r.kernel.org
Subject: Re: [PATCH] wl1251: dynamically allocate memory used for DMA

"H. Nikolaus Schaller" <hns@...delico.com> wrote:

> With introduction of vmap'ed stacks, stack parameters can no
> longer be used for DMA and now leads to kernel panic.
> 
> It happens at several places for the wl1251 (e.g. when
> accessed through SDIO) making it unuseable on e.g. the
> OpenPandora.
> 
> We solve this by allocating temporary buffers or use wl1251_read32().
> 
> Tested on v5.18-rc5 with OpenPandora.
> 
> Fixes: a1c510d0adc6 ("ARM: implement support for vmap'ed stacks")
> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>

Patch applied to wireless-next.git, thanks.

454744754cbf wl1251: dynamically allocate memory used for DMA

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/1676021ae8b6d7aada0b1806fed99b1b8359bdc4.1651495112.git.hns@goldelico.com/

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