https://github.com/torvalds/linux
Revision 08c5cd37480f59ea39682f4585d92269be6b1424 authored by Alan Stern on 16 September 2016, 14:24:26 UTC, committed by Greg Kroah-Hartman on 16 September 2016, 14:29:41 UTC
Some full-speed mceusb infrared transceivers contain invalid endpoint descriptors for their interrupt endpoints, with bInterval set to 0. In the past they have worked out okay with the mceusb driver, because the driver sets the bInterval field in the descriptor to 1, overwriting whatever value may have been there before. However, this approach was never sanctioned by the USB core, and in fact it does not work with xHCI controllers, because they use the bInterval value that was present when the configuration was installed. Currently usbcore uses 32 ms as the default interval if the value in the endpoint descriptor is invalid. It turns out that these IR transceivers don't work properly unless the interval is set to 10 ms or below. To work around this mceusb problem, this patch changes the endpoint-descriptor parsing routine, making the default interval value be 10 ms rather than 32 ms. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Wade Berrier <wberrier@gmail.com> CC: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 parent ed3d6d0
Tip revision: 08c5cd37480f59ea39682f4585d92269be6b1424 authored by Alan Stern on 16 September 2016, 14:24:26 UTC
USB: change bInterval default to 10 ms
USB: change bInterval default to 10 ms
Tip revision: 08c5cd3
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
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| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 95.5 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 363.6 KB |
| Makefile | -rw-r--r-- | 56.8 KB |
| README | -rw-r--r-- | 18.1 KB |
| REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
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