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| author | Baolin Wang <baolin.wang@linaro.org> | 2017-10-25 19:25:09 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-10-25 14:00:03 +0200 |
| commit | 54e2fc28d9cf1be7dd2ebe74b20dc20cc2a3e55d (patch) | |
| tree | 0529a9106aefb1366c480348b81e446e3db585a3 /drivers/spi/spi-sprd-adi.c | |
| parent | 8955b26d227263a0938daae77f981da927e19513 (diff) | |
| download | lwn-54e2fc28d9cf1be7dd2ebe74b20dc20cc2a3e55d.tar.gz lwn-54e2fc28d9cf1be7dd2ebe74b20dc20cc2a3e55d.zip | |
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 <dan.carpenter@oracle.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sprd-adi.c')
| -rw-r--r-- | drivers/spi/spi-sprd-adi.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |