dmaengine: idma64: convert to __ffs() (87b04596) · Commits · 戴 / test

We replace __fls() by __ffs() since we have to find a *minimum* data width that satisfies both source and destination. Signed-off-by:

drivers/dma/idma64.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -257,15 +257,15 @@ static u64 idma64_hw_desc_fill(struct idma64_hw_desc *hw,
		dar = config->dst_addr;
		ctllo \|= IDMA64C_CTLL_DST_FIX \| IDMA64C_CTLL_SRC_INC \|
		IDMA64C_CTLL_FC_M2P;
		src_width = min_t(u32, 2, __fls(sar \| hw->len));
		dst_width = __fls(config->dst_addr_width);
		src_width = min_t(u32, 2, __ffs(sar \| hw->len));
		dst_width = __ffs(config->dst_addr_width);
		} else { /* DMA_DEV_TO_MEM */
		sar = config->src_addr;
		dar = hw->phys;
		ctllo \|= IDMA64C_CTLL_DST_INC \| IDMA64C_CTLL_SRC_FIX \|
		IDMA64C_CTLL_FC_P2M;
		src_width = __fls(config->src_addr_width);
		dst_width = min_t(u32, 2, __fls(dar \| hw->len));
		src_width = __ffs(config->src_addr_width);
		dst_width = min_t(u32, 2, __ffs(dar \| hw->len));
		}

		lli->sar = sar;