From: robert.foss@collabora.com
To: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org,
aisheng.dong@freescale.com, suneel.garapati@xilinx.com,
wenkai.du@intel.com, johan.derycke@barco.com,
ludovic.desroches@atmel.com, haibo.chen@freescale.com,
ivan.ivanov@linaro.org, ulf.hansson@linaro.org
Cc: enric.balletbo@collabora.com, tomeu.vizoso@collabora.com,
Christopher Freeman <cfreeman@nvidia.com>
Subject: [PATCH] mmc: sdhci: Do not allow tuning procedure to be interrupted
Date: Fri, 22 Jul 2016 10:17:31 -0400 [thread overview]
Message-ID: <1469197051-18733-1-git-send-email-robert.foss@collabora.com> (raw)
From: Christopher Freeman <cfreeman@nvidia.com>
wait_event_interruptible_timeout() will return early if the blocked
process receives a signal, causing the driver to abort the tuning
procedure and possibly leaving the controller in a bad state. Since the
tuning command is expected to complete quickly (<50ms) and we've set a
timeout, use wait_event_timeout() instead.
Signed-off-by: Christopher Freeman <cfreeman@nvidia.com>
---
drivers/mmc/host/sdhci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ef3eee7..2029090 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2009,7 +2009,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
spin_unlock_irqrestore(&host->lock, flags);
/* Wait for Buffer Read Ready interrupt */
- wait_event_interruptible_timeout(host->buf_ready_int,
+ wait_event_timeout(host->buf_ready_int,
(host->tuning_done == 1),
msecs_to_jiffies(50));
spin_lock_irqsave(&host->lock, flags);
--
2.7.4
reply other threads:[~2016-07-22 14:17 UTC|newest]
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