linux-kernel - Re: [PATCH v2 2/3] mtd: spi-nor: stm32-quadspi: fix prefetching outside fsize

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Message-ID: <d438795f-b5a5-b275-2058-ef48bc68fc2d@wedev4u.fr>
Date:   Sun, 29 Oct 2017 18:57:37 +0100
From:   Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>
To:     Ludovic Barre <ludovic.Barre@...com>,
        Marek Vasut <marek.vasut@...il.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/3] mtd: spi-nor: stm32-quadspi: fix prefetching
 outside fsize

Le 26/10/2017 à 17:12, Ludovic Barre a écrit :
> From: Ludovic Barre <ludovic.barre@...com>
> 
> When memory-mapped mode is used, a prefetching mechanism fully
> managed by the hardware allows to optimize the read from external
> the QSPI memory. A 32-bytes FIFO is used for prefetching.
> When the limit of flash size - fifo size is reached the prefetching
> mechanism tries to read outside the fsize.
> The stm32 quadspi hardware become busy and should be aborted.
> 
> Signed-off-by: Ludovic Barre <ludovic.barre@...com>
> Reported-by: Bruno Herrera <bruherrera@...il.com>
> Tested-by: Bruno Herrera <bruherrera@...il.com>

Applied to the spi-nor/next branch of l2-mtd

Thanks!