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Cope gracefully with device_get_children returning an error.

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Obtained from: Hans Petter Selasky
P4: http://perforce.freebsd.org/chv.cgi?CH=112957
This commit is contained in:
Warner Losh 2007-01-19 08:49:28 +00:00
parent 64b4073914
commit 7e2ff8bbff
1 changed files with 5 additions and 2 deletions
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7
sys/dev/cardbus/cardbus.c
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@ -217,7 +217,8 @@ cardbus_detach_card(device_t cbdev)
int tmp;
int err = 0;
device_get_children(cbdev, &devlist, &numdevs);
if (device_get_children(cbdev, &devlist, &numdevs) != 0)
return (ENOENT);
if (numdevs == 0) {
free(devlist, M_TEMP);
@ -251,7 +252,9 @@ cardbus_driver_added(device_t cbdev, driver_t *driver)
struct cardbus_devinfo *dinfo;
DEVICE_IDENTIFY(driver, cbdev);
device_get_children(cbdev, &devlist, &numdevs);
if (device_get_children(cbdev, &devlist, &numdevs) != 0)
return;
/*
* If there are no drivers attached, but there are children,
* then power the card up.