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| author | Joe Jin <joe.jin@oracle.com> | 2011-01-07 10:20:54 (GMT) |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-01-10 15:46:31 (GMT) |
| commit | fc550e95921e109f3778a6b2dc560d63388810ab (patch) | |
| tree | 432771bf1dc084b52aa22412b49d766bd1671edc /drivers/video/xen-fbfront.c | |
| parent | 731f3ab66a23dab28a359e87364f53d221b3d366 (diff) | |
| download | linux-fc550e95921e109f3778a6b2dc560d63388810ab.tar.xz | |
xen/fb: fix potential memory leak
This patch fixes a potential memory leak when xenfb connect to
the backend fails.
Thanks for Ian's review and comments.
[v2: reworded the commit message a bit]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Joe Jin <joe.jin@oracle.com>
Tested-by: Gurudas Pai <gurudas.pai@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/video/xen-fbfront.c')
| -rw-r--r-- | drivers/video/xen-fbfront.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c index f92313d..95bbd0a 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)); @@ -603,15 +601,18 @@ 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; } |