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authorTejun Heo <tj@kernel.org>2011-02-24 19:30:37 +0100
committerJeff Garzik <jgarzik@redhat.com>2011-03-02 02:34:20 -0500
commiteb0e85e36b971ec31610eda7e3ff5c11c1c44785 (patch)
tree264924c95c0a12e952008c3658a93c096883b3e6 /drivers/ata
parent3e1f2356ce231488dc1fa844e5ce91bcb59fc2a1 (diff)
libata: fix hotplug for drivers which don't implement LPM
ata_eh_analyze_serror() suppresses hotplug notifications if LPM is being used because LPM generates spurious hotplug events. It compared whether link->lpm_policy was different from ATA_LPM_MAX_POWER to determine whether LPM is enabled; however, this is incorrect as for drivers which don't implement LPM, lpm_policy is always ATA_LPM_UNKNOWN. This disabled hotplug detection for all drivers which don't implement LPM. Fix it by comparing whether lpm_policy is greater than ATA_LPM_MAX_POWER. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@kernel.org Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-eh.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 17a637877d0..e16850e8d2f 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1618,7 +1618,7 @@ static void ata_eh_analyze_serror(struct ata_link *link)
* host links. For disabled PMP links, only N bit is
* considered as X bit is left at 1 for link plugging.
*/
- if (link->lpm_policy != ATA_LPM_MAX_POWER)
+ if (link->lpm_policy > ATA_LPM_MAX_POWER)
hotplug_mask = 0; /* hotplug doesn't work w/ LPM */
else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;