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Subject: Re: [PATCH] wl1251: dynamically allocate memory used for DMA
From:   Kalle Valo <kvalo@kernel.org>
In-Reply-To: <1676021ae8b6d7aada0b1806fed99b1b8359bdc4.1651495112.git.hns@goldelico.com>
References: <1676021ae8b6d7aada0b1806fed99b1b8359bdc4.1651495112.git.hns@goldelico.com>
To:     "H. Nikolaus Schaller" <hns@goldelico.com>
Cc:     arnd@arndb.de, tony@atomide.com,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        "H. Nikolaus Schaller" <hns@goldelico.com>,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org,
        kernel@pyra-handheld.com, linux-omap@vger.kernel.org
User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.7.3
Message-ID: <165181750762.835.18351799442836112147.kvalo@kernel.org>
Date:   Fri,  6 May 2022 06:11:52 +0000 (UTC)
Precedence: bulk

"H. Nikolaus Schaller" <hns@goldelico.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@goldelico.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