From: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
To: imunsie@au1.ibm.com, michael.neuling@au1.ibm.com,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] cxl: Fix PSL timebase synchronization detection
Date: Wed, 24 Feb 2016 18:27:51 +0100 [thread overview]
Message-ID: <1456334871-30397-1-git-send-email-fbarrat@linux.vnet.ibm.com> (raw)
The PSL timebase synchronization is seemingly failing for
configuration not including VIRT_CPU_ACCOUNTING_NATIVE. The driver
shows the following trace in dmesg:
PSL: Timebase sync: giving up!
The PSL timebase register is actually syncing correctly, but the cxl
driver is not detecting it. Fix is to use the proper timebase-to-time
conversion.
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # 4.3+
---
drivers/misc/cxl/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 4c1903f..0c6c17a1 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -415,7 +415,7 @@ static int cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev)
delta = mftb() - psl_tb;
if (delta < 0)
delta = -delta;
- } while (cputime_to_usecs(delta) > 16);
+ } while (tb_to_ns(delta) > 16000);
return 0;
}
--
1.9.1
next reply other threads:[~2016-02-24 17:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 17:27 Frederic Barrat [this message]
2016-02-24 17:37 ` [PATCH] cxl: Fix PSL timebase synchronization detection Michael Neuling
2016-02-24 18:13 ` Matthew R. Ochs
2016-02-25 0:20 ` Ian Munsie
2016-02-25 0:30 ` Andrew Donnellan
2016-02-25 1:19 ` Vaibhav Jain
2016-02-29 11:01 ` Michael Ellerman
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=1456334871-30397-1-git-send-email-fbarrat@linux.vnet.ibm.com \
--to=fbarrat@linux.vnet.ibm.com \
--cc=imunsie@au1.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=michael.neuling@au1.ibm.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).