The patch titled
usb: dma bounce buffer support V3 (fix)
has been added to the -mm tree. Its filename is
usb-dma-bounce-buffer-support-v3-fix.patch
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------------------------------------------------------
Subject: usb: dma bounce buffer support V3 (fix)
From: "Magnus Damm" <magnus.damm@xxxxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/usb/core/hcd.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -puN drivers/usb/core/hcd.c~usb-dma-bounce-buffer-support-v3-fix drivers/usb/core/hcd.c
--- a/drivers/usb/core/hcd.c~usb-dma-bounce-buffer-support-v3-fix
+++ a/drivers/usb/core/hcd.c
@@ -1125,6 +1125,14 @@ static int hcd_alloc_coherent(struct usb
if (!vaddr)
return -ENOMEM;
+ /*
+ * Store the virtual address of the buffer at the end
+ * of the allocated dma buffer. The size of the buffer
+ * may be uneven so use unaligned functions instead
+ * of just rounding up. It makes sense to optimize for
+ * memory footprint over access speed since the amount
+ * of memory available for dma may be limited.
+ */
put_unaligned((unsigned long)*vaddr_handle,
(unsigned long *)(vaddr + size));
_
Patches currently in -mm which might be from magnus.damm@xxxxxxxxx are
usb-dma-bounce-buffer-support-v3.patch
usb-dma-bounce-buffer-support-v3-checkpatch-fixes.patch
usb-dma-bounce-buffer-support-v3-fix.patch
usb-ohci-sm501-driver-v2.patch
usb-ohci-sm501-driver-v2-fix.patch
sm501fb-control-panel-pin-usage-with-platform-data-flags.patch
sm501fb-clear-framebuffer-memory-and-palette.patch
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