qemu/0341-usb-fail-usbdevice_create-when-there-is-no-USB-bus.patch
Cole Robinson 9290838132 Fix boot hang if console is not connected (bz #894451)
Fix segfault with zero length virtio-scsi disk (bz #847549)
2013-02-02 15:47:37 -05:00

45 lines
1.5 KiB
Diff

From cf0ad23ce4dc68d0617b01cc5eefdd133f87cafc Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@redhat.com>
Date: Sun, 25 Nov 2012 16:49:15 +0100
Subject: [PATCH] usb: fail usbdevice_create() when there is no USB bus
Report an error instead of segfaulting when attaching a USB device to a
machine with no USB busses:
$ qemu-system-arm -machine vexpress-a9 \
-sd Fedora-17-armhfp-vexpress-mmcblk0.img \
-kernel vmlinuz-3.4.2-3.fc17.armv7hl \
-initrd initramfs-3.4.2-3.fc17.armv7hl.img \
-usbdevice disk:format=raw:test.img
Note that the vexpress-a9 machine does not have a USB host controller.
Reported-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit c128d6a6d785eb9235a4f6dbd52f405ab8c60bee)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
hw/usb/bus.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index b649360..1f73a52 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -585,6 +585,13 @@ USBDevice *usbdevice_create(const char *cmdline)
return NULL;
}
+ if (!bus) {
+ error_report("Error: no usb bus to attach usbdevice %s, "
+ "please try -machine usb=on and check that "
+ "the machine model supports USB", driver);
+ return NULL;
+ }
+
if (!f->usbdevice_init) {
if (*params) {
error_report("usbdevice %s accepts no params", driver);