]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
usb: Make USB persist default configurable
authorJulius Werner <jwerner@chromium.org>
Wed, 13 Mar 2013 22:57:31 +0000 (15:57 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 29 Mar 2013 16:29:12 +0000 (09:29 -0700)
commit4f48203881ce947a0cbd8ae7b1a1a1b04aaa3766
tree522224ae58cbe21d4468cffb2f54af31dd7b5094
parent70b55c2ad0e5c8bbbb36cedf6a37f9d029cfd403
usb: Make USB persist default configurable

Commit 9214d1d8 set the USB persist flag as a default for all devices.
This might be desirable for some distributions, but it certainly has its
trade-offs... most importantly, it can significantly increase system
resume time, because the kernel blocks on resuming (and sometimes
resetting) USB devices before it unfreezes userspace.

This patch introduces a new config option CONFIG_USB_DEFAULT_PERSIST,
which allows distributions to make this decision on their own without
the need to carry a custom patch or revert the kernel's setting in
userspace.

[edited the Kconfig help text a bit - gregkh]

Signed-off-by: Julius Werner <jwerner@chromium.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/Kconfig
drivers/usb/core/quirks.c