linux-kernel - Re: [PATCH 2/2] mtd: rawnand: use bounce buffer when vmalloced data buf detected

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Date:   Tue, 1 Oct 2019 13:07:43 -0400
From:   Kamal Dasu <kdasu.kdev@...il.com>
To:     Richard Weinberger <richard@....at>
Cc:     Kamal Dasu <kamal.dasu@...adcom.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Brian Norris <computersforpeace@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Schrempf Frieder <frieder.schrempf@...tron.de>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mtd: rawnand: use bounce buffer when vmalloced data
 buf detected

I was testing with UBI/UBIFS where vmalloced  data buffers can be
passed to the nand_base and then o the controller driver. Probably
applies to older kernel 4.1.

Can the Patch1/2 be accepted or you want me to send it separately by
removing the nand_base changes ?.

Kamal

Kamal

On Mon, Sep 30, 2019 at 3:39 PM Richard Weinberger <richard@....at> wrote:
>
> ----- Ursprüngliche Mail -----
> > Von: "Kamal Dasu" <kamal.dasu@...adcom.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