mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
36 lines
1.5 KiB
Diff
36 lines
1.5 KiB
Diff
|
From ebed787a0becb9354f0a23620a5130cccd6c730c Mon Sep 17 00:00:00 2001
|
||
|
|
From: Daniel Golle <daniel@makrotopia.org>
|
||
|
|
Date: Thu, 19 Jan 2023 03:45:43 +0000
|
||
|
|
Subject: [PATCH] mtd: spinand: macronix: use scratch buffer for DMA operation
|
||
|
|
|
||
|
|
The mx35lf1ge4ab_get_eccsr() function uses an SPI DMA operation to
|
||
|
|
read the eccsr, hence the buffer should not be on stack. Since commit
|
||
|
|
380583227c0c7f ("spi: spi-mem: Add extra sanity checks on the op param")
|
||
|
|
the kernel emmits a warning and blocks such operations.
|
||
|
|
|
||
|
|
Use the scratch buffer to get eccsr instead of trying to directly read
|
||
|
|
into a stack-allocated variable.
|
||
|
|
|
||
|
|
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
|
||
|
|
Reviewed-by: Dhruva Gole <d-gole@ti.com>
|
||
|
|
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
|
||
|
|
Link: https://lore.kernel.org/linux-mtd/Y8i85zM0u4XdM46z@makrotopia.org
|
||
|
|
---
|
||
|
|
drivers/mtd/nand/spi/macronix.c | 3 ++-
|
||
|
|
1 file changed, 2 insertions(+), 1 deletion(-)
|
||
|
|
|
||
|
|
--- a/drivers/mtd/nand/spi/macronix.c
|
||
|
|
+++ b/drivers/mtd/nand/spi/macronix.c
|
||
|
|
@@ -83,9 +83,10 @@ static int mx35lf1ge4ab_ecc_get_status(s
|
||
|
|
* in order to avoid forcing the wear-leveling layer to move
|
||
|
|
* data around if it's not necessary.
|
||
|
|
*/
|
||
|
|
- if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr))
|
||
|
|
+ if (mx35lf1ge4ab_get_eccsr(spinand, spinand->scratchbuf))
|
||
|
|
return nanddev_get_ecc_conf(nand)->strength;
|
||
|
|
|
||
|
|
+ eccsr = *spinand->scratchbuf;
|
||
|
|
if (WARN_ON(eccsr > nanddev_get_ecc_conf(nand)->strength ||
|
||
|
|
!eccsr))
|
||
|
|
return nanddev_get_ecc_conf(nand)->strength;
|