4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Brezillon <boris.brezil...@free-electrons.com>

commit 2c2469bc03d569c49119db2cccb5cb3f0c6a5b33 upstream.

readl_poll_timeout() calls usleep_range(), but
regmap_atmel_hlcdc_reg_write() is called in atomic context (regmap
spinlock held).

Replace the readl_poll_timeout() call by readl_poll_timeout_atomic().

Fixes: ea31c0cf9b07 ("mfd: atmel-hlcdc: Implement config synchronization")
Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/mfd/atmel-hlcdc.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/mfd/atmel-hlcdc.c
+++ b/drivers/mfd/atmel-hlcdc.c
@@ -50,8 +50,9 @@ static int regmap_atmel_hlcdc_reg_write(
        if (reg <= ATMEL_HLCDC_DIS) {
                u32 status;
 
-               readl_poll_timeout(hregmap->regs + ATMEL_HLCDC_SR, status,
-                                  !(status & ATMEL_HLCDC_SIP), 1, 100);
+               readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
+                                         status, !(status & ATMEL_HLCDC_SIP),
+                                         1, 100);
        }
 
        writel(val, hregmap->regs + reg);


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