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Propagate down USB explore error codes, so that failures to enumerate USB HUBs

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behind USB HUBs are detected and the USB reset counter logic will kick in
preventing enumeration of continuously failing ports.

Submitted by:	phk@
Tested by:	bz@
PR:		237666
MFC after:	1 week
Sponsored by:	Mellanox Technologies // NVIDIA Networking
This commit is contained in:
Hans Petter Selasky 2021-05-18 15:52:00 +02:00
parent 70ffaaa69c
commit e5ff940a81
1 changed files with 13 additions and 10 deletions
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23
sys/dev/usb/usb_hub.c
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@ -513,7 +513,7 @@ uhub_explore_sub(struct uhub_softc *sc, struct usb_port *up)
usb_error_t err;
bus = sc->sc_udev->bus;
err = 0;
err = USB_ERR_NORMAL_COMPLETION;
/* get driver added refcount from USB bus */
refcount = bus->driver_added_refcount;
@ -1013,7 +1013,7 @@ uhub_explore(struct usb_device *udev)
if (udev->flags.self_suspended) {
/* need to wait until the child signals resume */
DPRINTF("Device is suspended!\n");
return (0);
return (USB_ERR_NORMAL_COMPLETION);
}
/*
@ -1022,6 +1022,12 @@ uhub_explore(struct usb_device *udev)
*/
do_unlock = usbd_enum_lock(udev);
/*
* Set default error code to avoid compiler warnings.
* Note that hub->nports cannot be zero.
*/
err = USB_ERR_NORMAL_COMPLETION;
for (x = 0; x != hub->nports; x++) {
up = hub->ports + x;
portno = x + 1;
@ -1090,13 +1096,11 @@ uhub_explore(struct usb_device *udev)
break;
}
}
err = uhub_explore_sub(sc, up);
if (err) {
/* no device(s) present */
continue;
if (uhub_explore_sub(sc, up) == USB_ERR_NORMAL_COMPLETION) {
/* explore succeeded - reset restart counter */
up->restartcnt = 0;
}
/* explore succeeded - reset restart counter */
up->restartcnt = 0;
}
if (do_unlock)
@ -1105,8 +1109,7 @@ uhub_explore(struct usb_device *udev)
/* initial status checked */
sc->sc_flags |= UHUB_FLAG_DID_EXPLORE;
/* return success */
return (USB_ERR_NORMAL_COMPLETION);
return (err);
}
int