linux-kernel - [PATCH v5 08/10] mtd: spi-nor: core: Update flash's current address mode when changing address mode

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Message-Id: <20230331074606.3559258-9-tudor.ambarus@linaro.org>
Date:   Fri, 31 Mar 2023 07:46:04 +0000
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     michael@...le.cc, pratyush@...nel.org
Cc:     miquel.raynal@...tlin.com, richard@....at,
        Takahiro.Kuwano@...ineon.com, bacem.daassi@...ineon.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Tudor Ambarus <tudor.ambarus@...aro.org>,
        stable@...r.kernel.org
Subject: [PATCH v5 08/10] mtd: spi-nor: core: Update flash's current address mode when changing address mode

The bug was obswerved while reading code. There are not many users of
addr_mode_nbytes. Anyway, we should update the flash's current address
mode when changing the address mode, fix it. We don't care for now about
the set_4byte_addr_mode(nor, false) from spi_nor_restore(), as it is
used at driver remove and shutdown.

Fixes: d7931a215063 ("mtd: spi-nor: core: Track flash's internal address mode")
Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
Cc: stable@...r.kernel.org
---
 drivers/mtd/spi-nor/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 0517a61975e4..4f0d90d3dad5 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3135,6 +3135,7 @@ static int spi_nor_quad_enable(struct spi_nor *nor)
 
 static int spi_nor_init(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = nor->params;
 	int err;
 
 	err = spi_nor_octal_dtr_enable(nor, true);
@@ -3176,9 +3177,10 @@ static int spi_nor_init(struct spi_nor *nor)
 		 */
 		WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET,
 			  "enabling reset hack; may not recover from unexpected reboots\n");
-		err = nor->params->set_4byte_addr_mode(nor, true);
+		err = params->set_4byte_addr_mode(nor, true);
 		if (err && err != -ENOTSUPP)
 			return err;
+		params->addr_mode_nbytes = 4;
 	}
 
 	return 0;
-- 
2.40.0.348.gf938b09366-goog