dmaengine Archive on lore.kernel.org
 help / color / Atom feed
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Dan Williams <dan.j.williams@intel.com>,
	Vinod Koul <vkoul@kernel.org>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Simon Horman <horms+renesas@verge.net.au>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
	Baolin Wang <baolin.wang@linaro.org>,
	Colin Ian King <colin.king@canonical.com>,
	Stephen Boyd <swboyd@chromium.org>,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] dmaengine: rcar-dmac: Fix runtime PM imbalance on error
Date: Sat, 23 May 2020 21:45:05 +0800
Message-ID: <20200523134507.6882-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Also, call pm_runtime_disable() when pm_runtime_get_sync() returns
an error code.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/dma/sh/rcar-dmac.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 59b36ab5d684..19fe80985740 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1879,6 +1879,8 @@ static int rcar_dmac_probe(struct platform_device *pdev)
 	ret = pm_runtime_get_sync(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
+		pm_runtime_put_noidle(&pdev->dev);
+		pm_runtime_disable(&pdev->dev);
 		return ret;
 	}
 
-- 
2.17.1


                 reply index

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=20200523134507.6882-1-dinghao.liu@zju.edu.cn \
    --to=dinghao.liu@zju.edu.cn \
    --cc=baolin.wang@linaro.org \
    --cc=colin.king@canonical.com \
    --cc=dan.j.williams@intel.com \
    --cc=dmaengine@vger.kernel.org \
    --cc=geert+renesas@glider.be \
    --cc=horms+renesas@verge.net.au \
    --cc=kjlu@umn.edu \
    --cc=linux-kernel@vger.kernel.org \
    --cc=swboyd@chromium.org \
    --cc=vkoul@kernel.org \
    --cc=yoshihiro.shimoda.uh@renesas.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

dmaengine Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/dmaengine/0 dmaengine/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dmaengine dmaengine/ https://lore.kernel.org/dmaengine \
		dmaengine@vger.kernel.org
	public-inbox-index dmaengine

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.dmaengine


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git