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[SCSI] libata: reset once

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Hotplug testing with libsas currently encounters a 55 second wait for
link recovery to give up.  In the case where the user trusts the
response time of their devices permit the recovery attempts to be
limited to one.

Signed-off-by: Dan Williams <[email protected]>
Acked-by: Jeff Garzik <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Dan Williams 2012-06-21 23:41:41 -07:00 • committed by James Bottomley
commit ca6d43b051
4 changed files with 7 additions and 0 deletions
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1
drivers/ata/libata-core.c
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@ -6387,6 +6387,7 @@ static int __init ata_parse_force_one(char **cur,
{ "nohrst", .lflags = ATA_LFLAG_NO_HRST },
{ "nosrst", .lflags = ATA_LFLAG_NO_SRST },
{ "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
{ "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
};
char *start = *cur, *p = *cur;
char *id, *val, *endp;

2
drivers/ata/libata-eh.c
View file

@ -2623,6 +2623,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
*/
while (ata_eh_reset_timeouts[max_tries] != ULONG_MAX)
max_tries++;
if (link->flags & ATA_LFLAG_RST_ONCE)
max_tries = 1;
if (link->flags & ATA_LFLAG_NO_HRST)
hardreset = NULL;
if (link->flags & ATA_LFLAG_NO_SRST)