On 5/29/2014 12:34 AM, Marek Szyprowski wrote:
> Hello,
>
> On 2014-05-29 08:29, Joonsoo Kim wrote:
>> 'cma: Remove potential deadlock situation' introduces per cma area mutex
>> for bitmap management. It is good, but there is one mistake. When we
>> can't find appropriate area in bitmap, we release cma_mutex global lock
>> rather than cma->lock and this is a bug. So fix it.
>>
>> Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
>
> Thanks for spotting this issue. I've added it to my tree.
>
>> diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
>> index 6f6bffc..83969f8 100644
>> --- a/drivers/base/dma-contiguous.c
>> +++ b/drivers/base/dma-contiguous.c
>> @@ -331,7 +331,7 @@ struct page *dma_alloc_from_contiguous(struct device
>> *dev, int count,
>> pageno = bitmap_find_next_zero_area(cma->bitmap, cma->count,
>> start, count, mask);
>> if (pageno >= cma->count) {
>> - mutex_unlock(&cma_mutex);
>> + mutex_unlock(&cma->lock);
>> break;
>> }
>> bitmap_set(cma->bitmap, pageno, count);
>
> Best regards
Acked-by: Laura Abbott <lau...@codeaurora.org>
Who actually ended up picking up that patch? I sent it out but didn't realize
it had been
picked up.
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