[PATCH] spi: bcm2835aux: use 64-bit arithmetic instead of 32-bit

[Gustavo A. R. Silva]

Hi Eric,

On 02/08/2018 02:22 AM, Eric Anholt wrote:
> "Gustavo A. R. Silva" <gustavo at embeddedor.com> writes:
> 
>> Add suffix ULL to constant 9 in order to give the compiler complete
>> information about the proper arithmetic to use. Notice that this
>> constant is used in a context that expects an expression of type
>> unsigned long long (64 bits, unsigned).
>>
>> The expression tfr->len * 9 * 1000000 is currently being evaluated
>> using 32-bit arithmetic.
>>
>> Addresses-Coverity-ID: 1339619
>> Signed-off-by: Gustavo A. R. Silva <gustavo at embeddedor.com>
> 
> The effect looks like it would be that we would have chosen polling mode
> instead of waiting for interrupts for some transfers >477 seconds.
> Seems like a good fix for an unlikely bug.
> 
> Reviewed-by: Eric Anholt <eric at anholt.net>
> 

Thank you for your review.

--
Gustavo