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| author | Takashi Iwai <tiwai@suse.de> | 2013-08-01 11:12:10 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-08-01 11:12:10 +0200 |
| commit | 209fb1b7e298c5f5a93a9450bc9e9e7923f745d9 (patch) | |
| tree | 27cbfa78e5eeaceb2aae1c165f7f0e24f6fee286 /include/uapi/linux | |
| parent | a8d30608eaed6cc759b8e2e8a8bbbb42591f797f (diff) | |
| parent | 3fef7f795fff7ccc58d55a28315ca73305515884 (diff) | |
Merge tag 'asoc-v3.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v3.11
A fix to make sure userspace knows when control writes have caused a
change in value, fixing some UIs, plus a few few driver fixes mainly
cleaning up issues from recent refactorings on less mainstream platforms.
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/usb/ch11.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/usb/ch11.h b/include/uapi/linux/usb/ch11.h index 7692dc69ccf7..331499d597fa 100644 --- a/include/uapi/linux/usb/ch11.h +++ b/include/uapi/linux/usb/ch11.h @@ -11,6 +11,17 @@ #include <linux/types.h> /* __u8 etc */ +/* This is arbitrary. + * From USB 2.0 spec Table 11-13, offset 7, a hub can + * have up to 255 ports. The most yet reported is 10. + * + * Current Wireless USB host hardware (Intel i1480 for example) allows + * up to 22 devices to connect. Upcoming hardware might raise that + * limit. Because the arrays need to add a bit for hub status data, we + * use 31, so plus one evens out to four bytes. + */ +#define USB_MAXCHILDREN 31 + /* * Hub request types */ |