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5253 kmem_alloc/kmem_zalloc won't fail with KM_SLEEP
5254 getrbuf won't fail with KM_SLEEP

@@ -1428,13 +1428,10 @@
         /*
          * the scheme ensures each time only one device addr
          * is set each time
          */
         disconn_ie = kmem_zalloc(sizeof (wusb_ie_dev_disconnect_t), KM_SLEEP);
-        if (!disconn_ie) {
-                return (USB_NO_RESOURCES);
-        }
 
         disconn_ie->bIEIdentifier = WUSB_IE_DEV_DISCONNECT;
         disconn_ie->bDeviceAddress[0] = addr;
         /* padding, no active wusb device addr will be 1 */
         disconn_ie->bDeviceAddress[1] = 1;