USB: isp1760: Flush the D-cache for the pipe-in transfer buffers

[net-next-2.6.git] / drivers / usb / host / isp1760-hcd.c

diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index 27b8f7cb4471e8399f8262feaca409388b11957f..9f01293600b0559e9d30ca6a11ae2244e102189b 100644 (file)
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -17,7 +17,9 @@
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
+#include <linux/mm.h>
 #include <asm/unaligned.h>
+#include <asm/cacheflush.h>
 
 #include "../core/hcd.h"
 #include "isp1760-hcd.h"
@@ -904,6 +906,14 @@ __acquires(priv->lock)
                        status = 0;
        }
 
+       if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
+               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));
+       }
+
        /* complete() can reenter this HCD */
        usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
        spin_unlock(&priv->lock);