linux-kernel - [PATCH 5.18 0795/1095] mtd: spi-nor: fix spi_nor_spimem_setup_op() call in spi_nor_erase

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Date:   Mon, 15 Aug 2022 20:03:14 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Alexander Sverdlin <alexander.sverdlin@...ia.com>,
        Pratyush Yadav <p.yadav@...com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0795/1095] mtd: spi-nor: fix spi_nor_spimem_setup_op() call in spi_nor_erase_{sector,chip}()

From: Patrice Chotard <patrice.chotard@...s.st.com>

[ Upstream commit f8cd9f632f4415b1e8838bdca8ab42cfb37a6584 ]

For erase operations, reg_proto must be used as indicated in
struct spi_nor description in spi-nor.h.

This issue was found when DT property spi-tx-bus-width is set to 4.
In this case the spi_mem_op->addr.buswidth is set to 4 for erase command
which is not correct.

Tested on stm32mp157c-ev1 board with mx66l51235f spi-nor.

Fixes: 0e30f47232ab ("mtd: spi-nor: add support for DTR protocol")
Signed-off-by: Patrice Chotard <patrice.chotard@...s.st.com>
[ta: use nor->reg_proto in spi_nor_controller_ops_erase()]
Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@...ia.com>
Reviewed-by: Pratyush Yadav <p.yadav@...com>
Link: https://lore.kernel.org/r/20220629133013.3382393-1-patrice.chotard@foss.st.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/spi-nor/core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index c1630131c734..170182eb431e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -177,7 +177,7 @@ int spi_nor_controller_ops_write_reg(struct spi_nor *nor, u8 opcode,
 
 static int spi_nor_controller_ops_erase(struct spi_nor *nor, loff_t offs)
 {
-	if (spi_nor_protocol_is_dtr(nor->write_proto))
+	if (spi_nor_protocol_is_dtr(nor->reg_proto))
 		return -EOPNOTSUPP;
 
 	return nor->controller_ops->erase(nor, offs);
@@ -976,7 +976,7 @@ static int spi_nor_erase_chip(struct spi_nor *nor)
 				   SPI_MEM_OP_NO_DUMMY,
 				   SPI_MEM_OP_NO_DATA);
 
-		spi_nor_spimem_setup_op(nor, &op, nor->write_proto);
+		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
@@ -1121,7 +1121,7 @@ int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
 				   SPI_MEM_OP_NO_DUMMY,
 				   SPI_MEM_OP_NO_DATA);
 
-		spi_nor_spimem_setup_op(nor, &op, nor->write_proto);
+		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		return spi_mem_exec_op(nor->spimem, &op);
 	} else if (nor->controller_ops->erase) {
-- 
2.35.1