From: Andy Gross <agross@codeaurora.org>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@sonymobile.com>,
"Ivan T. Ivanov" <iivanov@mm-sol.com>,
linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Andy Gross <agross@codeaurora.org>
Subject: [PATCH] i2c: qup: Fix order of runtime pm initialization
Date: Mon, 29 Sep 2014 17:00:51 -0500 [thread overview]
Message-ID: <1412028051-21774-1-git-send-email-agross@codeaurora.org> (raw)
The runtime pm calls need to be done before populating the children via the
i2c_add_adapter call. If this is not done, a child can run into issues trying
to do i2c read/writes due to the pm_runtime_sync failing.
Signed-off-by: Andy Gross <agross@codeaurora.org>
---
drivers/i2c/busses/i2c-qup.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
index 3a4d64e..092d89b 100644
--- a/drivers/i2c/busses/i2c-qup.c
+++ b/drivers/i2c/busses/i2c-qup.c
@@ -674,16 +674,20 @@ static int qup_i2c_probe(struct platform_device *pdev)
qup->adap.dev.of_node = pdev->dev.of_node;
strlcpy(qup->adap.name, "QUP I2C adapter", sizeof(qup->adap.name));
- ret = i2c_add_adapter(&qup->adap);
- if (ret)
- goto fail;
-
pm_runtime_set_autosuspend_delay(qup->dev, MSEC_PER_SEC);
pm_runtime_use_autosuspend(qup->dev);
pm_runtime_set_active(qup->dev);
pm_runtime_enable(qup->dev);
+
+ ret = i2c_add_adapter(&qup->adap);
+ if (ret)
+ goto fail_runtime;
+
return 0;
+fail_runtime:
+ pm_runtime_disable(qup->dev);
+ pm_runtime_set_suspended(qup->dev);
fail:
qup_i2c_disable_clocks(qup);
return ret;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
next reply other threads:[~2014-09-29 22:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-29 22:00 Andy Gross [this message]
2014-09-29 22:49 ` [PATCH] i2c: qup: Fix order of runtime pm initialization Felipe Balbi
[not found] ` <1412028051-21774-1-git-send-email-agross-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-09-30 1:53 ` Bjorn Andersson
2014-09-30 19:59 ` Andy Gross
2014-09-30 20:03 ` Bjorn Andersson
2014-10-03 1:21 ` Wolfram Sang
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=1412028051-21774-1-git-send-email-agross@codeaurora.org \
--to=agross@codeaurora.org \
--cc=bjorn.andersson@sonymobile.com \
--cc=iivanov@mm-sol.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=wsa@the-dreams.de \
/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).