USB: fix limited_power setting mistake in hub.c

This patch (jx001) fixes a variable assignment mistake in hub driver.
limited_power should be set to 0 if the hub is self-powered,and 1 if
the hub is bus-powered.

However, the effect of the code was exactly opposite to the spec's
statement for the Local Power Source field. The spec says, this field
is 1 meaning Local power supply lost while this field is 0 indicating
Local power supply good.(This statement is very confusing.)

So this patch switchs the 0 and 1.


Signed-off-by: Jason Xiao <jidong.xiao@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 691acf2223c2..481dca641ea2 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2818,9 +2818,9 @@ static void hub_events(void)
                                 clear_hub_feature(hdev, C_HUB_LOCAL_POWER);
                                 if (hubstatus & HUB_STATUS_LOCAL_POWER)
                                         /* FIXME: Is this always true? */
-                                        hub->limited_power = 0;
-                                else
                                         hub->limited_power = 1;
+                                else
+                                        hub->limited_power = 0;
                         }
                         if (hubchange & HUB_CHANGE_OVERCURRENT) {
                                 dev_dbg (hub_dev, "overcurrent change\n");