tree f88970931b26d2ad344d7d67ddabc64d9b48181d
parent 57c9efdfb3cee5d4564fcb5f70555e2edb1bc52a
author Tejun Heo <htejun@gmail.com> 1207576039 +0900
committer Jeff Garzik <jgarzik@redhat.com> 1208461463 -0400

libata: clear SError after link resume

SError used to be cleared in ->postreset.  This has small hotplug race
condition.  If a device is plugged in after reset is complete but
postreset hasn't run yet, its hotplug event gets lost when SError is
cleared.  This patch makes sata_link_resume() clear SError.  This
kills the race condition and makes a lot of sense as some PMP and host
PHYs don't work properly without SError cleared.

This change makes sata_pmp_std_{pre|post}_reset()'s unnecessary as
they become identical to ata_std counterparts.  It also simplifies
sata_pmp_hardreset() and ahci_vt8251_hardreset().

Signed-off-by: Tejun Heo <htejun@gmail.com>