Patch "mfd: atmel-hlcdc: Do not sleep in atomic context" has been added to the 4.4-stable tree

Patch "mfd: atmel-hlcdc: Do not sleep in atomic context" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mfd: atmel-hlcdc: Do not sleep in atomic context

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mfd-atmel-hlcdc-do-not-sleep-in-atomic-context.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2c2469bc03d569c49119db2cccb5cb3f0c6a5b33 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Tue, 6 Sep 2016 14:19:29 +0200
Subject: mfd: atmel-hlcdc: Do not sleep in atomic context

From: Boris Brezillon <boris.brezillon@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.brezillon@free-electrons.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@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);


Patches currently in stable-queue which might be from boris.brezillon@free-electrons.com are

queue-4.4/mfd-atmel-hlcdc-do-not-sleep-in-atomic-context.patch