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David Woodhouse authored
On a 64-bit kernel, skb->tail is an offset, not a pointer. The libertas usb driver passes it to usb_fill_bulk_urb() anyway, causing interesting crashes. Fix that by using skb->data instead. This highlights a problem with usb_fill_bulk_urb(). It doesn't notice when dma_map_single() fails and return the error to its caller as it should. In fact it _can't_ currently return the error, since it returns void. So this problem was showing up only at unmap time, after we'd already suffered memory corruption by doing DMA to a bogus address. Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Cc: stable@kernel.org Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
John W. Linville <linville@tuxdriver.com>
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