From: Tejun Heo Date: Thu, 29 Jan 2009 11:31:35 +0000 (+0900) Subject: libata: add no penalty retry request for EH device handling routines X-Git-Tag: MMI-PSA29.97-13-9~29662^2~1 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cf9a590a9eae3b99ca77d8db17afd2d7dbdd0986;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git libata: add no penalty retry request for EH device handling routines Let -EAGAIN from EH device handling routines trigger EH retry without consuming its tries count. This will be used to implement link SPD horkage which requires hardreset to adjust SPD without affecting other EH decisions. As it bypasses the forward progress guarantee provided by the tries count, the requester is responsible for ensuring forward progress. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index caa1e9fde3c9..ce2ef0475339 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3035,7 +3035,11 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err) { struct ata_eh_context *ehc = &dev->link->eh_context; - ehc->tries[dev->devno]--; + /* -EAGAIN from EH routine indicates retry without prejudice. + * The requester is responsible for ensuring forward progress. + */ + if (err != -EAGAIN) + ehc->tries[dev->devno]--; switch (err) { case -ENODEV: