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Date: Tue, 22 Jul 2014 16:26:46 +0530 From: Kishon Vijay Abraham I <kishon@...com> To: <gregkh@...uxfoundation.org> CC: <kishon@...com>, <linux-kernel@...r.kernel.org> Subject: [PATCH 23/28] phy: qcom-apq8064: fix possible timeout without check From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org> This patch fixes a possible timeout in poll loop without actually checking the register before return. In theory the there is a possibility of loop being scheduled after a long lock/delay, which would then force the loop to exit without actually checking the register. Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org> Signed-off-by: Kishon Vijay Abraham I <kishon@...com> --- drivers/phy/phy-qcom-apq8064-sata.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/phy-qcom-apq8064-sata.c b/drivers/phy/phy-qcom-apq8064-sata.c index d7c01aa..b3ef7d8 100644 --- a/drivers/phy/phy-qcom-apq8064-sata.c +++ b/drivers/phy/phy-qcom-apq8064-sata.c @@ -91,7 +91,7 @@ static int read_poll_timeout(void __iomem *addr, u32 mask) usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50); } while (!time_after(jiffies, timeout)); - return -ETIMEDOUT; + return (readl_relaxed(addr) & mask) ? 0 : -ETIMEDOUT; } static int qcom_apq8064_sata_phy_init(struct phy *generic_phy) -- 1.7.9.5 -- 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/
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