>From b7be39e0bbac3950057078ac66900ebc0871f77e Mon Sep 17 00:00:00 2001
From: Zhangfei Gao <[email protected]>
Date: Fri, 21 Jan 2011 18:02:47 -0500
Subject: [PATCH] mmc: clear all interrupt in suspend before free_irq
When debugging wifi host sleep, race condition about
SDHCI_INT_CARD_INT happens.
Host free_irq in suspend and request_irq when resume back.
However SDHCI_INT_CARD_INT is not cleared, so interrupt will
immediately happen after request_irq.
mmc_signal_sdio_irq will be called and wakeup sdio_irq_thread.
As a result irq_handler in sdio driver is called even before host
resume back.
The correct case is mmc_sdio_resume calls mmc_signal_sdio_irq to
wakeup sdio_irq_thread
Signed-off-by: Zhangfei Gao <[email protected]>
---
drivers/mmc/host/sdhci.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index aacd78c..97074ae 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1707,6 +1707,7 @@ int sdhci_suspend_host(struct sdhci_host *host,
pm_message_t state)
ret = mmc_suspend_host(host->mmc);
if (ret)
return ret;
+ sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, 0);
free_irq(host->irq, host);
--
1.7.0.4
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