[PATCH 3/3] mtd: nand: pxa3xx-nand: fix readid without keep_config

Robert Jarzmik
2015-08-11T20:01:32Z

The cases of READID detection are broken on pxa3xx. The reason is that
in the early stages of nand probing, ie. at pxa3xx_nand_scan(), we
always have :
- info->use_dma = 0 (regardless of dma support yet)
- info->chunk_size = 0 (not yet detected)

The READID issued by pxa3xx_nand_scan() will therefore end up in
handle_data_pio(), and do_bytes will be 0, leading to not reading the
nand id, and blocking detection.

This doesn't happen if "keep_config" is used, which is probably the most
tested case.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Fixes: 70ed85232a93 ("mtd: nand: pxa3xx: Introduce multiple page I/O
support")
---
drivers/mtd/nand/pxa3xx_nand.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index edfe329cc9db..b0737aec7caf 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1482,6 +1482,7 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
int i, ret, num;
uint16_t ecc_strength, ecc_step;

+ info->chunk_size = 512;
if (pdata->keep_config && !pxa3xx_nand_detect_config(info))
goto KEEP_CONFIG;

--
2.1.4