linux-kernel - [147/197] b43: Remove reset after fatal DMA error

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Message-Id: <20100422190920.465815919@kvm.kroah.org>
Date:	Thu, 22 Apr 2010 12:09:58 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Larry Finger <Larry.Finger@...inger.net>,
	"John W. Linville" <linville@...driver.com>,
	maximilian attems <max@...o.at>
Subject: [147/197] b43: Remove reset after fatal DMA error

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Larry Finger <Larry.Finger@...inger.net>

commit 214ac9a4ead6cb254451c09d9c8234a76693feb1 upstream.

As shown in Kernel Bugzilla #14761, doing a controller restart after a
fatal DMA error does not accomplish anything other than consume the CPU
on an affected system. Accordingly, substitute a meaningful message for
the restart.

Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
Signed-off-by: John W. Linville <linville@...driver.com>
Cc: maximilian attems <max@...o.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/wireless/b43/main.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -1788,7 +1788,10 @@ static void b43_do_interrupt_thread(stru
 			       dma_reason[0], dma_reason[1],
 			       dma_reason[2], dma_reason[3],
 			       dma_reason[4], dma_reason[5]);
-			b43_controller_restart(dev, "DMA error");
+			b43err(dev->wl, "This device does not support DMA "
+			       "on your system. Please use PIO instead.\n");
+			b43err(dev->wl, "CONFIG_B43_FORCE_PIO must be set in "
+			       "your kernel configuration.\n");
 			return;
 		}
 		if (merged_dma_reason & B43_DMAIRQ_NONFATALMASK) {


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