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| author | Tejun Heo <htejun@gmail.com> | 2008-03-06 05:09:34 +0100 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-03-11 01:50:34 +0100 |
| commit | eec59f76e9010e22d5736cf1907af4a92067522e (patch) | |
| tree | d7b4aeae7ee26618f33001c0bbb1a68f28bdc26f /drivers/ata/libata-eh.c | |
| parent | ata: replace remaining __FUNCTION__ occurrences (diff) | |
| download | linux-eec59f76e9010e22d5736cf1907af4a92067522e.tar.xz linux-eec59f76e9010e22d5736cf1907af4a92067522e.zip | |
libata: allow LLDs w/o any reset method
Some old SFF controllers don't have any way to reset the channel.
Currently, this isn't supported and libata EH causes an oops. Allow
LLDs w/o any reset method and just assume ATA class in such cases.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 698ce2cea52c..681252fd8143 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2150,6 +2150,15 @@ int ata_eh_reset(struct ata_link *link, int classify, ap->ops->set_piomode(ap, dev); } + if (!softreset && !hardreset) { + if (verbose) + ata_link_printk(link, KERN_INFO, "no reset method " + "available, skipping reset\n"); + if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) + lflags |= ATA_LFLAG_ASSUME_ATA; + goto done; + } + /* Determine which reset to use and record in ehc->i.action. * prereset() may examine and modify it. */ @@ -2254,6 +2263,7 @@ int ata_eh_reset(struct ata_link *link, int classify, lflags |= ATA_LFLAG_ASSUME_ATA; } + done: ata_link_for_each_dev(dev, link) { /* After the reset, the device state is PIO 0 and the * controller state is undefined. Reset also wakes up |