diff options
| author | Tejun Heo <tj@kernel.org> | 2009-10-14 11:18:28 +0900 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-10-16 06:21:32 -0400 |
| commit | 6489e3262e6b188a1a009b65e8a94b7aa17645b7 (patch) | |
| tree | 6d9e13bb5a57abd06b8373fc2dced674bed152a4 /drivers | |
| parent | 5deab536654f95345ea11e8ec6ed5c778df348b5 (diff) | |
| download | lwn-6489e3262e6b188a1a009b65e8a94b7aa17645b7.tar.gz lwn-6489e3262e6b188a1a009b65e8a94b7aa17645b7.zip | |
sata_nv: make sure link is brough up online when skipping hardreset
prereset doesn't bring link online if hardreset is about to happen and
nv_hardreset() may skip if conditions are not right so softreset may
be entered with non-working link status if the system firmware didn't
bring it up before entering OS code which can happen during resume.
This patch makes nv_hardreset() to bring up the link if it's skipping
reset.
This bug was reported by frodone@gmail.com in the following bug entry.
http://bugzilla.kernel.org/show_bug.cgi?id=14329
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: frodone@gmail.com
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/sata_nv.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index 86a40582999c..1eb4e020eb5c 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -1594,9 +1594,21 @@ static int nv_hardreset(struct ata_link *link, unsigned int *class, !ata_dev_enabled(link->device)) sata_link_hardreset(link, sata_deb_timing_hotplug, deadline, NULL, NULL); - else if (!(ehc->i.flags & ATA_EHI_QUIET)) - ata_link_printk(link, KERN_INFO, - "nv: skipping hardreset on occupied port\n"); + else { + const unsigned long *timing = sata_ehc_deb_timing(ehc); + int rc; + + if (!(ehc->i.flags & ATA_EHI_QUIET)) + ata_link_printk(link, KERN_INFO, "nv: skipping " + "hardreset on occupied port\n"); + + /* make sure the link is online */ + rc = sata_link_resume(link, timing, deadline); + /* whine about phy resume failure but proceed */ + if (rc && rc != -EOPNOTSUPP) + ata_link_printk(link, KERN_WARNING, "failed to resume " + "link (errno=%d)\n", rc); + } /* device signature acquisition is unreliable */ return -EAGAIN; |