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Date:   Mon, 30 Sep 2019 21:39:34 +0200 (CEST)
From:   Richard Weinberger <richard@nod.at>
To:     Kamal Dasu <kamal.dasu@broadcom.com>
Cc:     Boris Brezillon <boris.brezillon@collabora.com>,
        Kamal Dasu <kdasu.kdev@gmail.com>,
        Brian Norris <computersforpeace@gmail.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Marek Vasut <marek.vasut@gmail.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Boris Brezillon <bbrezillon@kernel.org>,
        Schrempf Frieder <frieder.schrempf@kontron.de>,
        linux-mtd <linux-mtd@lists.infradead.org>,
        bcm-kernel-feedback-list@broadcom.com,
        linux-kernel <linux-kernel@vger.kernel.org>
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References: <20190906194719.15761-1-kdasu.kdev@gmail.com> <20190906194719.15761-2-kdasu.kdev@gmail.com> <CAC=U0a1qvKO+t_62df_JcQBETAuNq0pwRkAb-Ofi3ski2rfdEQ@mail.gmail.com> <20190930182458.761e8077@collabora.com> <CAKekbevBxGh9HRLX_4N98NwKm4GnXWvy9kwi6i=nRVnmfmJ-vw@mail.gmail.com>
Subject: Re: [PATCH 2/2] mtd: rawnand: use bounce buffer when vmalloced data
 buf detected
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Thread-Topic: rawnand: use bounce buffer when vmalloced data buf detected
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----- Ursprüngliche Mail -----
> Von: "Kamal Dasu" <kamal.dasu@broadcom.com>
> This has been observed on MIPS4K and MIPS5K architectures. There is a
> check on the controller driver to use pio in such cases.

I fear your kernel misses commit:
074a1e1167af ("MIPS: Bounds check virt_addr_valid")

Thanks,
//richard