[PATCH 1/2] USB: Describe another source of EPIPE in documentation.

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On 2011-11-03 12:10 -0400, Alan Stern wrote:
> -EPIPE also means that the control endpoint doesn't recognize the
> command it received, which seems quite likely in this case.

Signed-off-by: Nick Bowler <nbowler@xxxxxxxxxxxxxxxx>
---
 Documentation/usb/error-codes.txt |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/Documentation/usb/error-codes.txt b/Documentation/usb/error-codes.txt
index b3f606b..242bc79 100644
--- a/Documentation/usb/error-codes.txt
+++ b/Documentation/usb/error-codes.txt
@@ -42,7 +42,8 @@ USB-specific:
 -EFBIG		Host controller driver can't schedule that many ISO frames.
 
 -EPIPE		The pipe type specified in the URB doesn't match the
-		endpoint's actual type.
+		endpoint's actual type, or the control endpoint doesn't
+		recognize the request.
 
 -EMSGSIZE	(a) endpoint maxpacket size is zero; it is not usable
 		    in the current interface altsetting.
-- 
1.7.3.4

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