Am 15.07.2015 13:28, schrieb Michael S. Tsirkin:
> On Wed, Jul 15, 2015 at 02:16:59PM +0300, Dan Carpenter wrote:
>> There is only one caller for vhost_kvzalloc() and it expects NULL on
>> allocation failure. Most people would probably expect that so let's
>> change ERR_PTR(-ENOMEM) to NULL.
>>
>> Fixes: 4de7255f7d2b ('vhost: extend memory regions allocation to vmalloc')
>> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> Ouch. Thanks a lot for noticing this, and it's a good thing
> you did before Linus merged it.
> I'll squash this into Igor's patch and redo my pull request.
>
Is this function needed at all ?
e.g. I followed vzalloc() to __vmalloc_node_range()
a check for size==0 seems to be done there.
re,
wh
>>
>> diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
>> index a9fe859..99d613b 100644
>> --- a/drivers/vhost/vhost.c
>> +++ b/drivers/vhost/vhost.c
>> @@ -686,7 +686,7 @@ static void *vhost_kvzalloc(unsigned long size)
>> if (!n) {
>> n = vzalloc(size);
>> if (!n)
>> - return ERR_PTR(-ENOMEM);
>> + return NULL;
>> }
>> return n;
>> }
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