Hi,
drivers need to return errors to user space.
A common source for them are urb->status and the
return value of usb_submit_urb(). They cannot be returned as
is to user space, as for example -EPIPE has a very
different meaning in user space. I'd like to add this small
helper for conversion.
What do you think?
Regards
Oliver
+/* 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;
+ }
+}
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