linux-kernel - [PATCH 2/7] dmaengine: pl330: Use FFS to calculate burst size

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Date:   Thu,  4 May 2023 14:57:32 +0000
From:   Joy Chakraborty <joychakr@...gle.com>
To:     Vinod Koul <vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, manugautam@...gle.com,
        danielmentz@...gle.com, sjadavani@...gle.com,
        Joy Chakraborty <joychakr@...gle.com>
Subject: [PATCH 2/7] dmaengine: pl330: Use FFS to calculate burst size

Use __ffs to calculate burst size in pl330_prep_dma_memcpy() for
consistency across the driver as other functions already use __ffs for
the same functionality.

Signed-off-by: Joy Chakraborty <joychakr@...gle.com>
---
 drivers/dma/pl330.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index c006e481b4c5..39a66ff29e27 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2804,10 +2804,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
 	while ((src | dst | len) & (burst - 1))
 		burst /= 2;
 
-	desc->rqcfg.src_brst_size = 0;
-	while (burst != (1 << desc->rqcfg.src_brst_size))
-		desc->rqcfg.src_brst_size++;
-
+	desc->rqcfg.src_brst_size = __ffs(burst);
 	desc->rqcfg.src_brst_len = get_burst_len(desc, len);
 	/*
 	 * If burst size is smaller than bus width then make sure we only
-- 
2.40.1.495.gc816e09b53d-goog