USB: Dealias -110 code (more complete)

The purpose of this patch is to split off the case when a device does
not reply on the lower level (which is reported by HC hardware), and
a case when the device accepted the request, but does not reply at
upper level. This redefinition allows to diagnose issues easier,
without asking the user if the -110 happened "immediately".

The usbmon splits such cases already thanks to its timestamp, but
it's not always available.

I adjusted all drivers which I found affected (by searching for "urb").
Out of tree drivers may suffer a little bit, but I do not expect much
breakage. At worst they may print a few messages.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 7 deletions

diff --git a/Documentation/usb/error-codes.txt b/Documentation/usb/error-codes.txt
index 867f4c38f356..39c68f8c4e6c 100644
--- a/Documentation/usb/error-codes.txt
+++ b/Documentation/usb/error-codes.txt
@@ -98,13 +98,13 @@ one or more packets could finish before an error stops further endpoint I/O.
                         error, a failure to respond (often caused by
                         device disconnect), or some other fault.
 
--ETIMEDOUT (**)         No response packet received within the prescribed
+-ETIME (**)             No response packet received within the prescribed
                         bus turn-around time.  This error may instead be
                         reported as -EPROTO or -EILSEQ.
 
-                        Note that the synchronous USB message functions
-                        also use this code to indicate timeout expired
-                        before the transfer completed.
+-ETIMEDOUT              Synchronous USB message functions use this code
+                        to indicate timeout expired before the transfer
+                        completed, and no other error was reported by HC.
 
 -EPIPE (**)             Endpoint stalled.  For non-control endpoints,
                         reset this status with usb_clear_halt().
@@ -163,6 +163,3 @@ usb_get_*/usb_set_*():
 usb_control_msg():
 usb_bulk_msg():
 -ETIMEDOUT              Timeout expired before the transfer completed.
-                        In the future this code may change to -ETIME,
-                        whose definition is a closer match to this sort
-                        of error.