linux-kernel - [PATCHv2 2/3] [media] s5p-jpeg: Fix compilation with COMPILE

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Date:	Tue, 09 Sep 2014 13:10:36 -0300
From:	Mauro Carvalho Chehab <m.chehab@...sung.com>
To:	Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Linux Media Mailing List <linux-media@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kamil Debski <k.debski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCHv2 2/3] [media] s5p-jpeg: Fix compilation with COMPILE_TEST

ERROR: "__bad_ndelay" [drivers/media/platform/s5p-jpeg/s5p-jpeg.ko] undefined!

That happens because asm-generic doesn't like any ndelay time
bigger than 20us.

Currently, usleep_range() couldn't simply be used, since
exynos4_jpeg_sw_reset() is called with a spinlock held.

So, let's use ndelay() instead.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@...sung.com>

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c
index e51c078360f5..ab6d6f43c96f 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c
@@ -23,7 +23,7 @@ void exynos4_jpeg_sw_reset(void __iomem *base)
 	reg = readl(base + EXYNOS4_JPEG_CNTL_REG);
 	writel(reg & ~EXYNOS4_SOFT_RESET_HI, base + EXYNOS4_JPEG_CNTL_REG);
 
-	ndelay(100000);
+	udelay(100);
 
 	writel(reg | EXYNOS4_SOFT_RESET_HI, base + EXYNOS4_JPEG_CNTL_REG);
 }
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