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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-10 08:48:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-10 08:48:46 -0800
commit9f99a2f0e44663517b99b69a3e4a499d0ba877df (patch)
tree92bbe9f9c9c6687a49e13e4e1bfe2a29bc736476 /drivers/video
parent8c8ae4e8cd5a67467192f3361eeec463694f8ed8 (diff)
parent110e7c7e4f8a61a34e0ab88fc9bdf4d5c6d220b2 (diff)
Merge branch 'stable/bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/event: validate irq before get evtchn by irq xen/fb: fix potential memory leak xen/fb: fix xenfb suspend/resume race. xen: disable ACPI NUMA for PV guests xen/irq: Cleanup the find_unbound_irq
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/xen-fbfront.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 4abb0b9ed65..3e6934d4bea 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -562,26 +562,24 @@ static void xenfb_init_shared_page(struct xenfb_info *info,
static int xenfb_connect_backend(struct xenbus_device *dev,
struct xenfb_info *info)
{
- int ret, evtchn;
+ int ret, evtchn, irq;
struct xenbus_transaction xbt;
ret = xenbus_alloc_evtchn(dev, &evtchn);
if (ret)
return ret;
- ret = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler,
+ irq = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler,
0, dev->devicetype, info);
- if (ret < 0) {
+ if (irq < 0) {
xenbus_free_evtchn(dev, evtchn);
xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler");
- return ret;
+ return irq;
}
- info->irq = ret;
-
again:
ret = xenbus_transaction_start(&xbt);
if (ret) {
xenbus_dev_fatal(dev, ret, "starting transaction");
- return ret;
+ goto unbind_irq;
}
ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
virt_to_mfn(info->page));
@@ -603,20 +601,25 @@ static int xenfb_connect_backend(struct xenbus_device *dev,
if (ret == -EAGAIN)
goto again;
xenbus_dev_fatal(dev, ret, "completing transaction");
- return ret;
+ goto unbind_irq;
}
xenbus_switch_state(dev, XenbusStateInitialised);
+ info->irq = irq;
return 0;
error_xenbus:
xenbus_transaction_end(xbt, 1);
xenbus_dev_fatal(dev, ret, "writing xenstore");
+ unbind_irq:
+ unbind_from_irqhandler(irq, info);
return ret;
}
static void xenfb_disconnect_backend(struct xenfb_info *info)
{
+ /* Prevent xenfb refresh */
+ info->update_wanted = 0;
if (info->irq >= 0)
unbind_from_irqhandler(info->irq, info);
info->irq = -1;