mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
e6f8b69918
Avoid using stack allocated memory for DMA operations. Fixes:156c00dedc("generic: backport Winbond W25N02KV SPI-NAND support") Fixes:b71c870caa("generic: 6.1: re-add two Winbond nand fixes") Signed-off-by: Daniel Golle <daniel@makrotopia.org>
50 lines
1.9 KiB
Diff
50 lines
1.9 KiB
Diff
From f5a05060670a4d8d6523afc7963eb559c2e3615f Mon Sep 17 00:00:00 2001
|
|
From: Olivier Maignial <olivier.maignial@hotmail.fr>
|
|
Date: Fri, 23 Jun 2023 17:33:37 +0200
|
|
Subject: [PATCH] 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: 6154c7a58348 ("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
|
|
---
|
|
drivers/mtd/nand/spi/winbond.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/mtd/nand/spi/winbond.c
|
|
+++ b/drivers/mtd/nand/spi/winbond.c
|
|
@@ -108,7 +108,7 @@ static int w25n02kv_ecc_get_status(struc
|
|
{
|
|
struct nand_device *nand = spinand_to_nand(spinand);
|
|
u8 mbf = 0;
|
|
- struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf);
|
|
+ struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, spinand->scratchbuf);
|
|
|
|
switch (status & STATUS_ECC_MASK) {
|
|
case STATUS_ECC_NO_BITFLIPS:
|
|
@@ -126,7 +126,7 @@ static int w25n02kv_ecc_get_status(struc
|
|
if (spi_mem_exec_op(spinand->spimem, &op))
|
|
return nanddev_get_ecc_conf(nand)->strength;
|
|
|
|
- mbf >>= 4;
|
|
+ mbf = *(spinand->scratchbuf) >> 4;
|
|
|
|
if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf))
|
|
return nanddev_get_ecc_conf(nand)->strength;
|