Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7;
From:   Miquel Raynal <miquel.raynal@bootlin.com>
To:     Rouven Czerwinski <r.czerwinski@pengutronix.de>,
        =?utf-8?q?Martin_Hundeb=C3=B8ll?= <martin@geanix.com>,
        =?utf-8?b?TcOl?= =?utf-8?b?bnMgUnVsbGfDpXJk?= <mans@mansr.com>,
        Alexander Shiyan <eagle.alexander923@gmail.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        JaimeLiao <jaimeliao.tw@gmail.com>
Cc:     kernel@pengutronix.de, stable@vger.kernel.org,
        linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mtd: rawnand: Ensure the nand chip supports cached reads
Date:   Mon, 16 Oct 2023 11:27:02 +0200
Message-Id: <20231016092702.288259-1-miquel.raynal@bootlin.com>
In-Reply-To: <20230922141717.35977-1-r.czerwinski@pengutronix.de>
References: 
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Fri, 2023-09-22 at 14:17:16 UTC, Rouven Czerwinski wrote:
> Both the JEDEC and ONFI specification say that read cache sequential
> support is an optional command. This means that we not only need to
> check whether the individual controller supports the command, we also
> need to check the parameter pages for both ONFI and JEDEC NAND flashes
> before enabling sequential cache reads.
> 
> This fixes support for NAND flashes which don't support enabling cache
> reads, i.e. Samsung K9F4G08U0F or Toshiba TC58NVG0S3HTA00.
> 
> Sequential cache reads are now only available for ONFI and JEDEC
> devices, if individual vendors implement this, it needs to be enabled
> per vendor.
> 
> Tested on i.MX6Q with a Samsung NAND flash chip that doesn't support
> sequential reads.
> 
> Fixes: 003fe4b9545b ("mtd: rawnand: Support for sequential cache reads")
> Cc: stable@vger.kernel.org
> Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/fixes, thanks.

Miquel