diff options
Diffstat (limited to 'include/linux/usb.h')
| -rw-r--r-- | include/linux/usb.h | 14 |
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 |