From: Tejun Heo Date: Wed, 14 Oct 2009 02:18:28 +0000 (+0900) Subject: sata_nv: make sure link is brough up online when skipping hardreset X-Git-Tag: v2.6.31.6~96 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7613217197c8927891e554c1734c1c417b22672b;p=karo-tx-linux.git sata_nv: make sure link is brough up online when skipping hardreset commit 6489e3262e6b188a1a009b65e8a94b7aa17645b7 upstream. prereset doesn't bring link online if hardreset is about to happen and nv_hardreset() may skip if conditions are not right so softreset may be entered with non-working link status if the system firmware didn't bring it up before entering OS code which can happen during resume. This patch makes nv_hardreset() to bring up the link if it's skipping reset. This bug was reported by frodone@gmail.com in the following bug entry. http://bugzilla.kernel.org/show_bug.cgi?id=14329 Signed-off-by: Tejun Heo Reported-by: frodone@gmail.com Signed-off-by: Jeff Garzik Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index 86a40582999c..1eb4e020eb5c 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -1594,9 +1594,21 @@ static int nv_hardreset(struct ata_link *link, unsigned int *class, !ata_dev_enabled(link->device)) sata_link_hardreset(link, sata_deb_timing_hotplug, deadline, NULL, NULL); - else if (!(ehc->i.flags & ATA_EHI_QUIET)) - ata_link_printk(link, KERN_INFO, - "nv: skipping hardreset on occupied port\n"); + else { + const unsigned long *timing = sata_ehc_deb_timing(ehc); + int rc; + + if (!(ehc->i.flags & ATA_EHI_QUIET)) + ata_link_printk(link, KERN_INFO, "nv: skipping " + "hardreset on occupied port\n"); + + /* make sure the link is online */ + rc = sata_link_resume(link, timing, deadline); + /* whine about phy resume failure but proceed */ + if (rc && rc != -EOPNOTSUPP) + ata_link_printk(link, KERN_WARNING, "failed to resume " + "link (errno=%d)\n", rc); + } /* device signature acquisition is unreliable */ return -EAGAIN;