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usb: fix port reset

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commit 891fb2cd45 removed the implicit
detach before (re-)attaching in usb_attach().  Some usb host controllers
used that behavior though to do a port reset by a detach+attach
sequence.

This patch establishes old behavior by adding a new usb_reset() function
for port resets and putting it into use, thereby also unifying port
reset behavior of all host controllers.  The patch also adds asserts to
usb_attach() and usb_detach() to make sure the calls are symmetrical.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-09-15 12:10:21 +02:00
parent 3393bc105d
commit e0b8e72dd9
5 changed files with 17 additions and 4 deletions
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2
hw/usb-uhci.c
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@ -341,7 +341,7 @@ static void uhci_reset(void *opaque)
port = &s->ports[i];
port->ctrl = 0x0080;
if (port->port.dev && port->port.dev->attached) {
usb_attach(&port->port);
usb_reset(&port->port);
}
}