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author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-06-16 13:06:04 -0700 |
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committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-06-17 11:28:21 -0700 |
commit | a9e758634f464ffb09344821a9f0b5a5c6df2b3e (patch) | |
tree | 5fe6502609769a90e77a7b9b91e2e2e691235572 /drivers/usb/core/hub.c | |
parent | b3df3f9c7df9a8d85e03e158d35487618a160901 (diff) | |
download | op-kernel-dev-a9e758634f464ffb09344821a9f0b5a5c6df2b3e.zip op-kernel-dev-a9e758634f464ffb09344821a9f0b5a5c6df2b3e.tar.gz |
USB: Fix up URB error codes to reflect implementation.
Documentation/usb/error-codes.txt mentions that urb->status can be set to
-EXDEV, if the isochronous transfer was not fully completed. However, in
practice, EHCI, UHCI, and OHCI all only set -EXDEV in the individual frame
status, never in the URB status. Those host controller actually always
pass in a zero status to usb_hcd_giveback_urb, and rely on the core to set
the appropriate status value.
The xHCI driver ran into issues with the uvcvideo driver when it tried to
set -EXDEV in urb->status, because the driver refused to submit URBs, and
the userspace camera application's video froze.
Clean up the documentation to reflect the actual implementation.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Diffstat (limited to 'drivers/usb/core/hub.c')
0 files changed, 0 insertions, 0 deletions