linux-kernel - [PATCH v2] dmaengine: Fix oops on dmatest module unload.

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Message-Id: <1234441811-9628-1-git-send-email-thierry.reding@avionic-design.de>
Date:	Thu, 12 Feb 2009 13:30:11 +0100
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
Cc:	haavard.skinnemoen@...el.com, linux-kernel@...r.kernel.org,
	dan.j.williams@...el.com
Subject: [PATCH v2] dmaengine: Fix oops on dmatest module unload.

This patch fixes an oops that happens when the dmatest module is unloaded. The
dma_release_channel() function is called on channels that have already been
cleaned up (and therefore freed) with dmatest_cleanup_channel().

Signed-off-by: Thierry Reding <thierry.reding@...onic-design.de>

---
 drivers/dma/dmatest.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 732fa1e..0fb053e 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -433,10 +433,10 @@ static void __exit dmatest_exit(void)
 
 	list_for_each_entry_safe(dtc, _dtc, &dmatest_channels, node) {
 		list_del(&dtc->node);
-		dmatest_cleanup_channel(dtc);
 		pr_debug("dmatest: dropped channel %s\n",
 			 dma_chan_name(dtc->chan));
 		dma_release_channel(dtc->chan);
+		dmatest_cleanup_channel(dtc);
 	}
 }
 module_exit(dmatest_exit);
-- 
tg: (8e49215..) adx/dma (depends on: adx/master)
--
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