From owner-svn-src-head@freebsd.org Wed May 25 03:30:57 2016 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4D9DDB478DE; Wed, 25 May 2016 03:30:57 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 04BA91EDB; Wed, 25 May 2016 03:30:56 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u4P3UuJO052570; Wed, 25 May 2016 03:30:56 GMT (envelope-from sephe@FreeBSD.org) Received: (from sephe@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u4P3Uuw0052569; Wed, 25 May 2016 03:30:56 GMT (envelope-from sephe@FreeBSD.org) Message-Id: <201605250330.u4P3Uuw0052569@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sephe set sender to sephe@FreeBSD.org using -f From: Sepherosa Ziehau Date: Wed, 25 May 2016 03:30:56 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r300644 - head/sys/dev/hyperv/vmbus X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 May 2016 03:30:57 -0000 Author: sephe Date: Wed May 25 03:30:56 2016 New Revision: 300644 URL: https://svnweb.freebsd.org/changeset/base/300644 Log: hyperv/vmbus: Check hyperv_dmamem_alloc return value Though it is highly unlikely this function would fail w/ BUS_DMA_WAITOK, we had better to check its return value; better safe then sorry here. MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D6518 Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Wed May 25 02:51:15 2016 (r300643) +++ head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Wed May 25 03:30:56 2016 (r300644) @@ -321,24 +321,34 @@ vmbus_synic_teardown(void *arg) wrmsr(HV_X64_MSR_SIEFP, siefp.as_uint64_t); } -static void +static int vmbus_dma_alloc(struct vmbus_softc *sc) { int cpu; CPU_FOREACH(cpu) { + void *ptr; + /* * Per-cpu messages and event flags. */ - VMBUS_PCPU_GET(sc, message, cpu) = hyperv_dmamem_alloc( - bus_get_dma_tag(sc->vmbus_dev), PAGE_SIZE, 0, PAGE_SIZE, + ptr = hyperv_dmamem_alloc(bus_get_dma_tag(sc->vmbus_dev), + PAGE_SIZE, 0, PAGE_SIZE, VMBUS_PCPU_PTR(sc, message_dma, cpu), BUS_DMA_WAITOK | BUS_DMA_ZERO); - VMBUS_PCPU_GET(sc, event_flag, cpu) = hyperv_dmamem_alloc( - bus_get_dma_tag(sc->vmbus_dev), PAGE_SIZE, 0, PAGE_SIZE, + if (ptr == NULL) + return ENOMEM; + VMBUS_PCPU_GET(sc, message, cpu) = ptr; + + ptr = hyperv_dmamem_alloc(bus_get_dma_tag(sc->vmbus_dev), + PAGE_SIZE, 0, PAGE_SIZE, VMBUS_PCPU_PTR(sc, event_flag_dma, cpu), BUS_DMA_WAITOK | BUS_DMA_ZERO); + if (ptr == NULL) + return ENOMEM; + VMBUS_PCPU_GET(sc, event_flag, cpu) = ptr; } + return 0; } static void @@ -622,7 +632,9 @@ vmbus_bus_init(void) /* * Allocate DMA stuffs. */ - vmbus_dma_alloc(sc); + ret = vmbus_dma_alloc(sc); + if (ret != 0) + goto cleanup; if (bootverbose) printf("VMBUS: Calling smp_rendezvous, smp_started = %d\n",