From: Tejun Heo <tj@kernel.org>
To: Jeff Garzik <jeff@garzik.org>,
IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: [PATCH #upstream-fixes] libata: mask off DET when restoring SControl for detach
Date: Mon, 03 Nov 2008 19:27:07 +0900 [thread overview]
Message-ID: <490ED1FB.9080505@kernel.org> (raw)
libata restores SControl on detach; however, trying to restore
non-zero DET can cause undeterministic behavior including PMP device
going offline till power cycling. Mask off DET when restoring
SControl.
Signed-off-by: Tejun Heo <tj@kernel.org>
---
drivers/ata/libata-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: work/drivers/ata/libata-core.c
===================================================================
--- work.orig/drivers/ata/libata-core.c
+++ work/drivers/ata/libata-core.c
@@ -5936,7 +5936,7 @@ static void ata_port_detach(struct ata_p
* to us. Restore SControl and disable all existing devices.
*/
__ata_port_for_each_link(link, ap) {
- sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
+ sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
ata_link_for_each_dev(dev, link)
ata_dev_disable(dev);
}
next reply other threads:[~2008-11-03 10:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-03 10:27 Tejun Heo [this message]
2008-11-04 6:11 ` [PATCH #upstream-fixes] libata: mask off DET when restoring SControl for detach Jeff Garzik
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=490ED1FB.9080505@kernel.org \
--to=tj@kernel.org \
--cc=jeff@garzik.org \
--cc=linux-ide@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.