From ba6f0b25373a4d1321571c7b691b6e5f4f9f65f4 Mon Sep 17 00:00:00 2001
From: Qiu Wujie <b49553@freescale.com>
Date: Mon, 17 Nov 2014 14:06:29 +0800
Subject: mmc: sdio: make sure sdio_irq_thread pointer is not NULL.

Signed-off-by: Wujie Qiu <B49553@freescale.com>
Change-Id: Icf01605c71a19e0ffa01e85b1ed93eb0704493da
Reviewed-on: http://git.am.freescale.net:8181/23831
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Xiaobo Xie <X.Xie@freescale.com>
Reviewed-by: Matthew Weigel <Matthew.Weigel@freescale.com>

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index e07bd97..f6e07a0 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -398,7 +398,8 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 {
 	host->ops->enable_sdio_irq(host, 0);
 	host->sdio_irq_pending = true;
-	wake_up_process(host->sdio_irq_thread);
+	if (host->sdio_irq_thread)
+		wake_up_process(host->sdio_irq_thread);
 }
 
 #ifdef CONFIG_REGULATOR
-- 
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