From: Axel Lin axel.lin@ingics.com
stable inclusion from stable-5.10.50 commit f0b8f5682db84d1e75b22dc62f14b114ce2917db bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit a336dc8f683e5be794186b5643cd34cb28dd2c53 ]
Use DIV_ROUND_UP to prevent truncation by integer division issue. This ensures we return enough delay time.
Also fix returning negative value when new_sel < old_sel.
Signed-off-by: Axel Lin axel.lin@ingics.com Link: https://lore.kernel.org/r/20210618141412.4014912-1-axel.lin@ingics.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/regulator/da9052-regulator.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c index e18d291c7f21..23fa429ebe76 100644 --- a/drivers/regulator/da9052-regulator.c +++ b/drivers/regulator/da9052-regulator.c @@ -250,7 +250,8 @@ static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev, case DA9052_ID_BUCK3: case DA9052_ID_LDO2: case DA9052_ID_LDO3: - ret = (new_sel - old_sel) * info->step_uV / 6250; + ret = DIV_ROUND_UP(abs(new_sel - old_sel) * info->step_uV, + 6250); break; }