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xen/evtchn_fifo: fix error return code in evtchn_fifo_setup()

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Fix to return -ENOMEM from the error handling case instead of
0 (overwrited to 0 by the HYPERVISOR_event_channel_op call),
otherwise the error condition cann't be reflected from the
return value.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Wei Yongjun 2014-01-07 21:11:25 +08:00 committed by Konrad Rzeszutek Wilk
parent 89b9e08f18
commit be1403b9e6
1 changed files with 4 additions and 2 deletions
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6
drivers/xen/events/events_fifo.c
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@ -109,7 +109,7 @@ static int evtchn_fifo_setup(struct irq_info *info)
{
unsigned port = info->evtchn;
unsigned new_array_pages;
int ret = -ENOMEM;
int ret;
new_array_pages = port / EVENT_WORDS_PER_PAGE + 1;
@ -124,8 +124,10 @@ static int evtchn_fifo_setup(struct irq_info *info)
array_page = event_array[event_array_pages];
if (!array_page) {
array_page = (void *)__get_free_page(GFP_KERNEL);
if (array_page == NULL)
if (array_page == NULL) {
ret = -ENOMEM;
goto error;
}
event_array[event_array_pages] = array_page;
}