* [PATCH] MTD: pxa3xx_nand: Fix blank page ECC mismatch
@ 2011-06-03 13:03 Daniel Mack
2011-06-03 15:04 ` Lei Wen
0 siblings, 1 reply; 4+ messages in thread
From: Daniel Mack @ 2011-06-03 13:03 UTC (permalink / raw)
To: linux-arm-kernel
This bug was introduced in f8155a40 ("mtd: pxa3xx_nand: rework irq
logic") and causes the PXA3xx NAND controller fail to operate with NAND
flash that has empty pages. According to the comment in this block, the
hardware controller will report a double-bit error for empty pages,
which can and must be ignored.
This patch restores the original behaviour of the driver.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Lei Wen <leiwen@marvell.com>
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable at kernel.org
---
drivers/mtd/nand/pxa3xx_nand.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 0c6ed72..60167d1 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -687,6 +687,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
* OOB, ignore such double bit errors
*/
if (is_buf_blank(buf, mtd->writesize))
+ info->retcode = ERR_NONE;
+ else
mtd->ecc_stats.failed++;
}
--
1.7.5.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH] MTD: pxa3xx_nand: Fix blank page ECC mismatch
2011-06-03 13:03 [PATCH] MTD: pxa3xx_nand: Fix blank page ECC mismatch Daniel Mack
@ 2011-06-03 15:04 ` Lei Wen
2011-06-03 15:31 ` Lei Wen
0 siblings, 1 reply; 4+ messages in thread
From: Lei Wen @ 2011-06-03 15:04 UTC (permalink / raw)
To: linux-arm-kernel
On Fri, Jun 3, 2011 at 9:03 PM, Daniel Mack <zonque@gmail.com> wrote:
> This bug was introduced in f8155a40 ("mtd: pxa3xx_nand: rework irq
> logic") and causes the PXA3xx NAND controller fail to operate with NAND
> flash that has empty pages. According to the comment in this block, the
> hardware controller will report a double-bit error for empty pages,
> which can and must be ignored.
>
> This patch restores the original behaviour of the driver.
>
> Signed-off-by: Daniel Mack <zonque@gmail.com>
> Cc: Lei Wen <leiwen@marvell.com>
> Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
> Cc: David Woodhouse <David.Woodhouse@intel.com>
> Cc: stable at kernel.org
> ---
> ?drivers/mtd/nand/pxa3xx_nand.c | ? ?2 ++
> ?1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index 0c6ed72..60167d1 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -687,6 +687,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
> ? ? ? ? ? ? ? ? * OOB, ignore such double bit errors
> ? ? ? ? ? ? ? ? */
> ? ? ? ? ? ? ? ?if (is_buf_blank(buf, mtd->writesize))
> + ? ? ? ? ? ? ? ? ? ? ? info->retcode = ERR_NONE;
> + ? ? ? ? ? ? ? else
> ? ? ? ? ? ? ? ? ? ? ? ?mtd->ecc_stats.failed++;
> ? ? ? ?}
>
> --
> 1.7.5.1
>
Acked-by: Lei Wen <leiwen@marvell.com>
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH] MTD: pxa3xx_nand: Fix blank page ECC mismatch
2011-06-03 15:04 ` Lei Wen
@ 2011-06-03 15:31 ` Lei Wen
2011-06-06 10:40 ` Artem Bityutskiy
0 siblings, 1 reply; 4+ messages in thread
From: Lei Wen @ 2011-06-03 15:31 UTC (permalink / raw)
To: linux-arm-kernel
Also cc to MTD mailist
Cc: linux-mtd at lists.infradead.org
On Fri, Jun 3, 2011 at 11:04 PM, Lei Wen <adrian.wenl@gmail.com> wrote:
> On Fri, Jun 3, 2011 at 9:03 PM, Daniel Mack <zonque@gmail.com> wrote:
>> This bug was introduced in f8155a40 ("mtd: pxa3xx_nand: rework irq
>> logic") and causes the PXA3xx NAND controller fail to operate with NAND
>> flash that has empty pages. According to the comment in this block, the
>> hardware controller will report a double-bit error for empty pages,
>> which can and must be ignored.
>>
>> This patch restores the original behaviour of the driver.
>>
>> Signed-off-by: Daniel Mack <zonque@gmail.com>
>> Cc: Lei Wen <leiwen@marvell.com>
>> Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
>> Cc: David Woodhouse <David.Woodhouse@intel.com>
>> Cc: stable at kernel.org
>> ---
>> ?drivers/mtd/nand/pxa3xx_nand.c | ? ?2 ++
>> ?1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
>> index 0c6ed72..60167d1 100644
>> --- a/drivers/mtd/nand/pxa3xx_nand.c
>> +++ b/drivers/mtd/nand/pxa3xx_nand.c
>> @@ -687,6 +687,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
>> ? ? ? ? ? ? ? ? * OOB, ignore such double bit errors
>> ? ? ? ? ? ? ? ? */
>> ? ? ? ? ? ? ? ?if (is_buf_blank(buf, mtd->writesize))
>> + ? ? ? ? ? ? ? ? ? ? ? info->retcode = ERR_NONE;
>> + ? ? ? ? ? ? ? else
>> ? ? ? ? ? ? ? ? ? ? ? ?mtd->ecc_stats.failed++;
>> ? ? ? ?}
>>
>> --
>> 1.7.5.1
>>
>
> Acked-by: Lei Wen <leiwen@marvell.com>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2011-06-03 13:03 [PATCH] MTD: pxa3xx_nand: Fix blank page ECC mismatch Daniel Mack
2011-06-03 15:04 ` Lei Wen
2011-06-03 15:31 ` Lei Wen
2011-06-06 10:40 ` Artem Bityutskiy
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