From: Yahu Gao gaoyahu19@gmail.com
[ Upstream commit bcd2be763252f3a4d5fc4d6008d4d96c601ee74b ]
The return value is ioprio * BFQ_WEIGHT_CONVERSION_COEFF or 0. What we want is ioprio or 0. Correct this by changing the calculation.
Signed-off-by: Yahu Gao gaoyahu19@gmail.com Acked-by: Paolo Valente paolo.valente@linaro.org Link: https://lore.kernel.org/r/20220107065859.25689-1-gaoyahu19@gmail.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/bfq-wf2q.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c index b74cc0da118e..709b901de3ca 100644 --- a/block/bfq-wf2q.c +++ b/block/bfq-wf2q.c @@ -519,7 +519,7 @@ unsigned short bfq_ioprio_to_weight(int ioprio) static unsigned short bfq_weight_to_ioprio(int weight) { return max_t(int, 0, - IOPRIO_NR_LEVELS * BFQ_WEIGHT_CONVERSION_COEFF - weight); + IOPRIO_NR_LEVELS - weight / BFQ_WEIGHT_CONVERSION_COEFF); }
static void bfq_get_entity(struct bfq_entity *entity)