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authorPete Zaitcev <zaitcev@redhat.com>2006-09-19 09:49:02 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 22:59:00 +0400
commit38e2bfc94e95dd6005fdaf40dfec0157396741da (patch)
tree1cc927239e3369ec7ce4920b1347dd8bc504bb2d /Documentation/usb
parentec17cf1cfe0b557210b27313bd584e9b5187d4ca (diff)
downloadlinux-38e2bfc94e95dd6005fdaf40dfec0157396741da.tar.xz
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>
Diffstat (limited to 'Documentation/usb')
-rw-r--r--Documentation/usb/error-codes.txt11
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.