From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiangliang Yu Subject: [PATCH 1/1] AHCI: disabled FBS before softreset handling. According to chapter 9.3.9 in AHCI spec, controller should disable FBS before softreset. Date: Wed, 25 Sep 2013 22:46:28 +0800 Message-ID: <1380120388-13375-1-git-send-email-yxlraid@gmail.com> Return-path: Received: from mail-pd0-f171.google.com ([209.85.192.171]:51902 "EHLO mail-pd0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755550Ab3IYOrb (ORCPT ); Wed, 25 Sep 2013 10:47:31 -0400 Received: by mail-pd0-f171.google.com with SMTP id g10so6164337pdj.2 for ; Wed, 25 Sep 2013 07:47:31 -0700 (PDT) Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: tj@kernel.org Cc: linux-ide@vger.kernel.org, Xiangliang Yu Signed-off-by: Xiangliang Yu --- drivers/ata/libahci.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index acfd0f7..8d024a4 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -1267,9 +1267,11 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, { struct ata_port *ap = link->ap; struct ahci_host_priv *hpriv = ap->host->private_data; + struct ahci_port_priv *pp = ap->private_data; const char *reason = NULL; unsigned long now, msecs; struct ata_taskfile tf; + bool flag = FALSE; int rc; DPRINTK("ENTER\n"); @@ -1279,6 +1281,11 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, if (rc && rc != -EOPNOTSUPP) ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); + if (!ata_is_host_link(link) && pp->fbs_enabled) { + ahci_disable_fbs(ap); + flag = TRUE; + } + ata_tf_init(link->device, &tf); /* issue the first D2H Register FIS */ @@ -1319,6 +1326,9 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class, } else *class = ahci_dev_classify(ap); + if (flag) + ahci_enable_fbs(ap); + DPRINTK("EXIT, class=%u\n", *class); return 0; -- 1.7.1