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mtd: spinand: winbond: Fix ecc_get_status
Reading ECC status is failing.
w25n02kv_ecc_get_status() is using on-stack buffer for
SPINAND_GET_FEATURE_OP() output. It is not suitable for
DMA needs of spi-mem.
Fix this by using the spi-mem operations dedicated buffer
spinand->scratchbuf.
See
spinand->scratchbuf:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/mtd/spinand.h?h=v6.3#n418
spi_mem_check_op():
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/spi/spi-mem.c?h=v6.3#n199
Fixes: 6154c7a583
("mtd: spinand: winbond: add Winbond W25N02KV flash support")
Cc: stable@vger.kernel.org
Signed-off-by: Olivier Maignial <olivier.maignial@hotmail.fr>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/DB4P250MB1032EDB9E36B764A33769039FE23A@DB4P250MB1032.EURP250.PROD.OUTLOOK.COM
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@ -108,7 +108,7 @@ static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
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{
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struct nand_device *nand = spinand_to_nand(spinand);
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u8 mbf = 0;
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struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf);
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struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, spinand->scratchbuf);
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switch (status & STATUS_ECC_MASK) {
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case STATUS_ECC_NO_BITFLIPS:
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@ -126,7 +126,7 @@ static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
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if (spi_mem_exec_op(spinand->spimem, &op))
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return nanddev_get_ecc_conf(nand)->strength;
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mbf >>= 4;
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mbf = *(spinand->scratchbuf) >> 4;
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if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf))
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return nanddev_get_ecc_conf(nand)->strength;
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