regulator: stm32-vrefbuf: fix check on ready flag

commit f63248fac563125fd5a2f0bc780ce7a299872cab upstream.

stm32_vrefbuf_enable() wrongly checks VRR bit: 0 stands for not ready,
1 for ready. It currently checks the opposite.
This makes enable routine to exit immediately without waiting for ready
flag.

Fixes: 0cdbf481e927 ("regulator: Add support for stm32-vrefbuf")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/regulator/stm32-vrefbuf.c b/drivers/regulator/stm32-vrefbuf.c
index 72c8b3e..e0a9c44 100644 (file)
--- a/drivers/regulator/stm32-vrefbuf.c
+++ b/drivers/regulator/stm32-vrefbuf.c
@@ -51,7 +51,7 @@ static int stm32_vrefbuf_enable(struct regulator_dev *rdev)
         * arbitrary timeout.
         */
        ret = readl_poll_timeout(priv->base + STM32_VREFBUF_CSR, val,
-                                !(val & STM32_VRR), 650, 10000);
+                                val & STM32_VRR, 650, 10000);
        if (ret) {
                dev_err(&rdev->dev, "stm32 vrefbuf timed out!\n");
                val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);