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| author | Tejun Heo <tj@kernel.org> | 2010-01-11 11:14:44 +0900 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-01-12 14:34:14 -0500 |
| commit | 5040ab67a2c6d5710ba497dc52a8f7035729d7b0 (patch) | |
| tree | dea2290e50111fde938bfcbb83de0377e7c4d94a /include | |
| parent | 0b67c7439fe2a5d76602de36854c88e2beab00b0 (diff) | |
| download | lwn-5040ab67a2c6d5710ba497dc52a8f7035729d7b0.tar.gz lwn-5040ab67a2c6d5710ba497dc52a8f7035729d7b0.zip | |
libata: retry link resume if necessary
Interestingly, when SIDPR is used in ata_piix, writes to DET in
SControl sometimes get ignored leading to detection failure. Update
sata_link_resume() such that it reads back SControl after clearing DET
and retry if it's not clear.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: fengxiangjun <fengxiangjun@neusoft.com>
Reported-by: Jim Faulkner <jfaulkne@ccs.neu.edu>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/libata.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 6a9c4ddd3d95..73112250862c 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -354,6 +354,9 @@ enum { /* max tries if error condition is still set after ->error_handler */ ATA_EH_MAX_TRIES = 5, + /* sometimes resuming a link requires several retries */ + ATA_LINK_RESUME_TRIES = 5, + /* how hard are we gonna try to probe/recover devices */ ATA_PROBE_MAX_TRIES = 3, ATA_EH_DEV_TRIES = 3, |