Attachment 56580 Details for Bug 130230

[patch] CARDBUS_IO_SIZE.patch

CARDBUS_IO_SIZE.patch (text/plain), 4.06 KB, created by Olaf Hering on 2005-11-07 12:01:53 UTC

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Creator: Olaf Hering

Created: 2005-11-07 12:01:53 UTC

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patch

obsolete

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>From: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
>To: git-commits-head@vger.kernel.org
>Subject: cardbus: limit IO windows to 256 bytes
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>tree ac636ec99466e67eaa1b52555517a48a1c4fcb35
>parent 9092b20803e4b3b3a480592794a73030f17370b3
>author Linus Torvalds <torvalds@g5.osdl.org> Mon, 24 Oct 2005 06:31:16 -0700
>committer Linus Torvalds <torvalds@g5.osdl.org> Mon, 24 Oct 2005 06:31:16 -0700
>
>cardbus: limit IO windows to 256 bytes
>
>That's what we've always historically done, and bigger windows seem to
>confuse some cardbus bridges. Or something.
>
>Alan reports that this makes the ThinkPad 600x series work properly
>again: the 4kB IO window for some reason made IDE DMA not work, which
>makes IDE painfully slow even if it works after DMA timeouts.
>
>Signed-off-by: Linus Torvalds <torvalds@osdl.org>
>
> drivers/pci/setup-bus.c |    2 +-
> 1 files changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
>--- a/drivers/pci/setup-bus.c
>+++ b/drivers/pci/setup-bus.c
>@@ -40,7 +40,7 @@
>  * FIXME: IO should be max 256 bytes.  However, since we may
>  * have a P2P bridge below a cardbus bridge, we need 4K.
>  */
>-#define CARDBUS_IO_SIZE		(4*1024)
>+#define CARDBUS_IO_SIZE		(256)
> #define CARDBUS_MEM_SIZE	(32*1024*1024)
> 
> static void __devinit
>-
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Attachments on bug 130230: 56580 | 56719