From 54e2fc28d9cf1be7dd2ebe74b20dc20cc2a3e55d Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Wed, 25 Oct 2017 19:25:09 +0800 Subject: [PATCH] spi: sprd: Fix the possible negative value of BIT() When enabling the ADI hardware channels, if the channel id is 31, then we will get one negative value -1 for BIT() macro, which will write incorrect value to register. Fixes: 7e2903cb91df ("spi: Add ADI driver for Spreadtrum platform") Reported-by: Dan Carpenter Signed-off-by: Baolin Wang Signed-off-by: Mark Brown --- drivers/spi/spi-sprd-adi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c index 6a5ff3003044..5993bdbf79e4 100644 --- a/drivers/spi/spi-sprd-adi.c +++ b/drivers/spi/spi-sprd-adi.c @@ -303,7 +303,7 @@ static void sprd_adi_hw_init(struct sprd_adi *sadi) writel_relaxed(chn_config, sadi->base + REG_ADI_CHN_ADDR(chn_id)); - if (chn_id < 31) { + if (chn_id < 32) { value = readl_relaxed(sadi->base + REG_ADI_CHN_EN); value |= BIT(chn_id); writel_relaxed(value, sadi->base + REG_ADI_CHN_EN); -- 2.11.0