From: wu000273@umn.edu
To: svarbanov@mm-sol.com
Cc: agross@kernel.org, bjorn.andersson@linaro.org,
lorenzo.pieralisi@arm.com, robh@kernel.org, helgaas@google.com,
p.zabel@pengutronix.de, linux-pci@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
Markus.Elfring@web.de, kjlu@umn.edu, wu000273@umn.edu
Subject: [PATCH V2] PCI: qcom: Improve exception handling in qcom_pcie_probe().
Date: Tue, 26 May 2020 21:55:31 -0500 [thread overview]
Message-ID: <20200527025531.32357-1-wu000273@umn.edu> (raw)
From: Qiushi Wu <wu000273@umn.edu>
This function contained improvable implementation details according to
exception handling.
1. pm_runtime_put() should be called after pm_runtime_get_sync() failed,
because the reference count will be increased despite of the failure.
Thus add the missed function call.
2. pm_runtime_disable() are called twice, after the call of phy_init() and
dw_pcie_host_init() failed. Thus remove redundant function calls.
Fixes: 6e5da6f7d824 ("PCI: qcom: Fix error handling in runtime PM support")
Co-developed-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
V2: words adjustments and fix some typos
drivers/pci/controller/dwc/pcie-qcom.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 138e1a2d21cc..10393ab607bf 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1340,8 +1340,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
- pm_runtime_disable(dev);
- return ret;
+ goto err_pm_runtime_put;
}
pci->dev = dev;
@@ -1401,7 +1400,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
ret = phy_init(pcie->phy);
if (ret) {
- pm_runtime_disable(&pdev->dev);
goto err_pm_runtime_put;
}
@@ -1410,7 +1408,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "cannot initialize host\n");
- pm_runtime_disable(&pdev->dev);
goto err_pm_runtime_put;
}
--
2.17.1
next reply other threads:[~2020-05-27 2:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-27 2:55 wu000273 [this message]
2020-05-27 5:38 ` [PATCH V2] PCI: qcom: Improve exception handling in qcom_pcie_probe() Markus Elfring
2020-07-08 15:24 ` Lorenzo Pieralisi
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=20200527025531.32357-1-wu000273@umn.edu \
--to=wu000273@umn.edu \
--cc=Markus.Elfring@web.de \
--cc=agross@kernel.org \
--cc=bjorn.andersson@linaro.org \
--cc=helgaas@google.com \
--cc=kjlu@umn.edu \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=p.zabel@pengutronix.de \
--cc=robh@kernel.org \
--cc=svarbanov@mm-sol.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).