From: Pratyush Yadav <p.yadav@ti.com>
To: Bert Vermeulen <bert@biot.com>
Cc: vigneshr@ti.com, tudor.ambarus@microchip.com, richard@nod.at,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
linux-mtd@lists.infradead.org, miquel.raynal@bootlin.com
Subject: Re: [RESEND PATCH v2] mtd: spi-nor: Fix address width on flash chips > 16MB
Date: Tue, 6 Oct 2020 20:48:07 +0530 [thread overview]
Message-ID: <20201006151807.2pckm7ncply7uomc@ti.com> (raw)
In-Reply-To: <20201006132346.12652-1-bert@biot.com>
On 06/10/20 03:23PM, Bert Vermeulen wrote:
> If a flash chip has more than 16MB capacity but its BFPT reports
> BFPT_DWORD1_ADDRESS_BYTES_3_OR_4, the spi-nor framework defaults to 3.
>
> The check in spi_nor_set_addr_width() doesn't catch it because addr_width
> did get set. This fixes that check.
>
> Fixes: f9acd7fa80be ("mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths")
> Signed-off-by: Bert Vermeulen <bert@biot.com>
> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
> ---
> drivers/mtd/spi-nor/core.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index 0369d98b2d12..a2c35ad9645c 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -3009,13 +3009,15 @@ static int spi_nor_set_addr_width(struct spi_nor *nor)
> /* already configured from SFDP */
> } else if (nor->info->addr_width) {
> nor->addr_width = nor->info->addr_width;
> - } else if (nor->mtd.size > 0x1000000) {
> - /* enable 4-byte addressing if the device exceeds 16MiB */
> - nor->addr_width = 4;
> } else {
> nor->addr_width = 3;
> }
>
> + if (nor->addr_width == 3 && nor->mtd.size > 0x1000000) {
Nitpick: ^^^^^^^^^^^^^^^^^^^^^^^^ you can drop this part. But its
fine either way.
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
> + /* enable 4-byte addressing if the device exceeds 16MiB */
> + nor->addr_width = 4;
> + }
> +
> if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) {
> dev_dbg(nor->dev, "address width is too large: %u\n",
> nor->addr_width);
--
Regards,
Pratyush Yadav
Texas Instruments India
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2020-10-06 15:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-06 13:23 [RESEND PATCH v2] mtd: spi-nor: Fix address width on flash chips > 16MB Bert Vermeulen
2020-10-06 15:18 ` Pratyush Yadav [this message]
2020-10-07 7:29 ` Vignesh Raghavendra
2020-10-07 7:48 ` Pratyush Yadav
2020-10-06 15:33 ` Greg KH
2020-10-29 4:46 ` Vignesh Raghavendra
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