linux-kernel - [PATCH 2/5 V2] mmc: core: call pm_runtime_put_noidle in pm_runtime_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 08 Apr 2013 09:36:39 +0800
From:	Li Fei <fei.li@...el.com>
To:	cjb@...top.org, ohad@...ery.com
Cc:	ulf.hansson@...aro.org, johan.rudholm@...ricsson.com,
	subhashj@...eaurora.org, rafael.j.wysocki@...el.com,
	thierry.reding@...onic-design.de, sachin.kamat@...aro.org,
	linux-mmc@...r.kernel.org, rjw@...k.pl,
	linux-kernel@...r.kernel.org, chuansheng.liu@...el.com,
	fei.li@...el.com
Subject: [PATCH 2/5 V2] mmc: core: call pm_runtime_put_noidle in
 pm_runtime_get_sync failed case


Even in failed case of pm_runtime_get_sync, the usage_count
is incremented. In order to keep the usage_count with correct
value and runtime power management to behave correctly, call
pm_runtime_put_noidle in such case.

Signed-off-by Liu Chuansheng <chuansheng.liu@...el.com>
Signed-off-by: Li Fei <fei.li@...el.com>
---
 drivers/mmc/core/sdio.c     |    4 +++-
 drivers/mmc/core/sdio_bus.c |    3 +--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index aa0719a..6889a82 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -861,8 +861,10 @@ static void mmc_sdio_detect(struct mmc_host *host)
 	/* Make sure card is powered before detecting it */
 	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
 		err = pm_runtime_get_sync(&host->card->dev);
-		if (err < 0)
+		if (err < 0) {
+			pm_runtime_put_noidle(&host->card->dev);
 			goto out;
+		}
 	}
 
 	mmc_claim_host(host);
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 5e57048..7bfefb5 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -137,7 +137,7 @@ static int sdio_bus_probe(struct device *dev)
 	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) {
 		ret = pm_runtime_get_sync(dev);
 		if (ret < 0)
-			goto out;
+			goto disable_runtimepm;
 	}
 
 	/* Set the default block size so the driver is sure it's something
@@ -157,7 +157,6 @@ static int sdio_bus_probe(struct device *dev)
 disable_runtimepm:
 	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
 		pm_runtime_put_noidle(dev);
-out:
 	return ret;
 }
 
-- 
1.7.4.1




--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/