Messages in this thread | | | Date | Tue, 02 Feb 2010 16:54:22 +0100 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH] isp1760: Flush the D-cache for the pipe-in transfer buffers |
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Ming Lei wrote: > 2010/2/2 Catalin Marinas <catalin.marinas@arm.com>: > >> + if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) == PIPE_BULK) { >> + void *ptr; >> + for (ptr = urb->transfer_buffer; >> + ptr < urb->transfer_buffer + urb->transfer_buffer_length; >> + ptr += PAGE_SIZE) >> + flush_dcache_page(virt_to_page(ptr)); > > If the page is mapped into highmem, seems virt_to_page doesn't work well.
This does not matter because this can not happen :). If the buffer is highmem then a bounce buffer is used. See commit 96983d2d8 aka "USB: storage: set bounce limit for non-DMA-capable host controllers"
Sebastian
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