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authorTejun Heo <htejun@gmail.com>2008-01-08 20:26:12 +0900
committerJeff Garzik <jeff@garzik.org>2008-01-10 16:53:22 -0500
commit4ccd3329a2e51473a86547a55f9e5f98f8f65b33 (patch)
tree40ef0e858a162c29b8a56392365588333b6eeb1e /drivers
parent2695e36616c3ece5e8e30666868fc7c90dc3fc75 (diff)
downloadop-kernel-dev-4ccd3329a2e51473a86547a55f9e5f98f8f65b33.zip
op-kernel-dev-4ccd3329a2e51473a86547a55f9e5f98f8f65b33.tar.gz
libata: don't normalize UNKNOWN to NONE after reset
After non-classifying reset, ehc->classes[] could contain ATA_DEV_UNKNOWN which used to be normalized to ATA_DEV_NONE for consistency. However, this causes unfortunate side effect for drivers which have non-classifying hardresets (e.g. sata_nv) by making hardreset report ATA_DEV_NONE for non-classifying resets and thus makes EH believe that the port is unoccupied and recovery can be skipped. The end result is that after a device is swapped with another one, the new device isn't attached after the old one is detached. This patch makes ata_eh_reset() not normalize UNKNOWN to NONE after non-classifying resets. This fixes the above problem. As UNKNOWN and NONE are handled differently by only EH hotplug logic, this doesn't cause other behavior changes. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libata-eh.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 74269ed..21a81cd 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2167,13 +2167,11 @@ int ata_eh_reset(struct ata_link *link, int classify,
if (ata_link_offline(link))
continue;
- /* apply class override and convert UNKNOWN to NONE */
+ /* apply class override */
if (lflags & ATA_LFLAG_ASSUME_ATA)
classes[dev->devno] = ATA_DEV_ATA;
else if (lflags & ATA_LFLAG_ASSUME_SEMB)
classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */
- else if (classes[dev->devno] == ATA_DEV_UNKNOWN)
- classes[dev->devno] = ATA_DEV_NONE;
}
/* record current link speed */
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