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authorAlan Stern <stern@rowland.harvard.edu>2008-09-22 14:44:26 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-10-17 14:40:57 -0700
commit8520f38099ccfdac2147a0852f84ee7a8ee5e197 (patch)
treecefc0256d9af7088992b7ed02bdae8ba95bf68fa /drivers/rapidio
parent3c4bb71f96c69ef3c81fda108c96b633a2000de2 (diff)
USB: change hub initialization sleeps to delayed_work
This patch (as1137) changes the hub_activate() routine, replacing the power-power-up and debounce delays with delayed_work calls. The idea is that on systems where the USB stack is compiled into the kernel rather than built as modules, these delays will no longer block the boot thread. At least 100 ms is saved for each root hub, which can add up to a significant savings in total boot time. Arjan van de Ven was very pleased to see that this shaved 700 ms off his computer's boot time. Since his total boot time is on the order of two seconds, the improvement is considerable. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/rapidio')
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