The old error history was cleared in ata_ering_clear().
It only sets ATA_EFLAG_OLD_ER eflags, but the err_mask was not cleared.
So ata_ering_map() still iterates the old error history.
This causes problem, for example, wrong probe trials count were returned in
ata_eh_schedule_probe(), which in turn causes SATA link speed to be slowed down
to 1.5Gbps.
Reported-and-tested-by: Martin Mokrejs <mmokrejs@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
Hi Jeff,
This patch fixes an old regression introduced in 2.6.37-rc1
of commit d902747.
So it should be included into stable releases since 2.6.37.
drivers/ata/libata-eh.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index c61316e..4c6f49b 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -419,9 +419,10 @@ int ata_ering_map(struct ata_ering *ering,
return rc;
}
-int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg)
+static int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg)
{
ent->eflags |= ATA_EFLAG_OLD_ER;
+ ent->err_mask = 0;
return 0;
}
--
1.7.2.5
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