Re: [PATCH] Fix libata-eh don't retry command after reset succeeded.

[Mark Lord <kernel@teksavvy.com>]

On 13-01-14 09:01 AM, Mark Lord wrote:
>>
>> From 9cc9a85f17a8525e53caf430611d762c105d324c Mon Sep 17 00:00:00 2001
>> From: Bian Yu <ycbzzjlby@gmail.com>
>> Date: Tue, 18 Dec 2012 05:58:34 -0500
>> Subject: [PATCH] Fix libata-eh don't retry command after reset succeeded.
>>  It's introduced by commit 8d899e70c1b3afff, When disk has a UNC error,
>>  qc->err_mask will set AC_ERR_MEDIA flag.
>>  Signed-off-by: Bian Yu <ycbzzjlby@gmail.com>
..
> Yup, good catch.  The original patch to fix retries (from me) had it that way,
> but somewhere among the enforced revisions this error crept in unnoticed.
> 
> Jeff -- wanna pick this one up?
> Could be useful for -stable, too.

The original version of this correction patch had the "Signed-off-by" line.
See below.


>From 78c0fb104c9957db682518b97ce6a01ce1bc07b6 Mon Sep 17 00:00:00 2001
From: Bian Yu <bianyu@kedacom.com>
Date: Wed, 12 Dec 2012 22:26:58 -0500
Subject: [PATCH] It should be a mistake introduced by commit 8d899e70c1b3afff.
 because only qc->flags can't be set AC_ERR_*

Signed-off-by: Bian Yu <bianyu@kedacom.com>
---
 drivers/ata/libata-eh.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index bf039b0..bcf4437 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2094,7 +2094,7 @@ static unsigned int ata_eh_speed_down(struct
ata_device *dev,
  */
 static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc)
 {
-       if (qc->flags & AC_ERR_MEDIA)
+       if (qc->err_mask & AC_ERR_MEDIA)
                return 0;       /* don't retry media errors */
        if (qc->flags & ATA_QCFLAG_IO)
                return 1;       /* otherwise retry anything from fs stack */