Commit f4cc1834 authored Jan 19, 2013 by Ming Lei Committed by Greg Kroah-Hartman Jan 20, 2013

USB: storage: avoid scanning other targets for single target device



This patch sets scsi_host->max_id as 1 if the device's quirk
flag of US_FL_SCM_MULT_TARG isn't set, because there are only 6
mass storage devices marked as mutiple targets from unusual_devs.h.

This patch is a small optimization about scanning targets, and
avoid scanning other 7 non-existed targets for single target
device.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent fde26380

drivers/usb/storage/usb.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -976,6 +976,9 @@ int usb_stor_probe2(struct us_data *us)
		if (us->fflags & US_FL_SINGLE_LUN)
		us->max_lun = 0;

		if (!(us->fflags & US_FL_SCM_MULT_TARG))
		us_to_host(us)->max_id = 1;

		/* Find the endpoints and calculate pipe values */
		result = get_pipes(us);
		if (result)

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