1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 7f8d4d61ca47..27a4e16d2bf1 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1233,6 +1233,7 @@ struct urb {
         void *transfer_buffer;          /* (in) associated data buffer */
         dma_addr_t transfer_dma;        /* (in) dma addr for transfer_buffer */
         struct scatterlist *sg;         /* (in) scatter gather buffer list */
+        int num_mapped_sgs;             /* (internal) mapped sg entries */
         int num_sgs;                    /* (in) number of entries in the sg list */
         u32 transfer_buffer_length;     /* (in) data buffer length */
         u32 actual_length;              /* (return) actual transfer length */
@@ -1610,6 +1611,19 @@ usb_maxpacket(struct usb_device *udev, int pipe, int is_out)
 
 /* ----------------------------------------------------------------------- */
 
+/* translate USB error codes to codes user space understands */
+static inline int usb_translate_errors(int error_code)
+{
+        switch (error_code) {
+        case 0:
+        case -ENOMEM:
+        case -ENODEV:
+                return error_code;
+        default:
+                return -EIO;
+        }
+}
+
 /* Events from the usb core */
 #define USB_DEVICE_ADD          0x0001
 #define USB_DEVICE_REMOVE       0x0002