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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-06-16 22:06:04 +0200 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-06-17 20:28:21 +0200 |
| commit | a9e758634f464ffb09344821a9f0b5a5c6df2b3e (patch) | |
| tree | 5fe6502609769a90e77a7b9b91e2e2e691235572 /Documentation/md.txt | |
| parent | xhci: Always set urb->status to zero for isoc endpoints. (diff) | |
| download | linux-a9e758634f464ffb09344821a9f0b5a5c6df2b3e.tar.xz linux-a9e758634f464ffb09344821a9f0b5a5c6df2b3e.zip | |
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 'Documentation/md.txt')
0 files changed, 0 insertions, 0 deletions