INQUIRY timeout value

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Everyone:

The default timeout for SCSI INQUIRY commands is 5 seconds.  For some 
USB storage devices this isn't long enough.  See for example

	http://bugzilla.kernel.org/show_bug.cgi?id=11640#c6

and the following comments.  Testing shows that Windows XP uses a
timeout of 20 seconds for INQUIRY commands to USB devices.

Is it reasonable to raise the default timeout to 20 seconds?

If it isn't, could we add an LLD-specific timeout value?  Then the 
actual timeout used would be the max of scsi_inq_timeout and the 
LLD's value.

Alan Stern

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