From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> [ Upstream commit 10628e3ecf544fa2e4e24f8e112d95c37884dc98 ] This function is supposed to return zero on success or negative error codes on error. Unfortunately, there is a bug so it sometimes returns non-zero, positive numbers on success. I noticed this bug during review and I can't test it. It does appear that the return is sometimes propogated back to _regmap_read() where all non-zero returns are treated as failure so this may affect run time. Fixes: 47c1697508f2 ("mfd: Align ab8500 with the abx500 interface") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/mfd/ab8500-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index bde2fc072410..44ebb84c2e74 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -259,7 +259,7 @@ static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, mutex_unlock(&ab8500->lock); dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); - return ret; + return (ret < 0) ? ret : 0; } static int ab8500_get_register(struct device *dev, u8 bank, -- 2.19.1