Patch "clk: bcm2835: add locking to pll*_on/off methods" has been added to the 4.5-stable tree

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

clk: bcm2835: add locking to pll*_on/off methods

to the 4.5-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:

     clk-bcm2835-add-locking-to-pll-_on-off-methods.patch

and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Martin Sperl <[email protected]>
Date: Mon, 29 Feb 2016 11:39:18 +0000
Subject: clk: bcm2835: add locking to pll*_on/off methods

From: Martin Sperl <[email protected]>

commit ec36a5c6682fdd5328abf15c3c67281bed0241d7 upstream.

Add missing locking to:
* bcm2835_pll_divider_on
* bcm2835_pll_divider_off
to protect the read modify write cycle for the register access protecting both cm_reg and a2w_reg registers.

audio domain clocks")

---
 drivers/clk/bcm/clk-bcm2835.c |    4 ++++
 1 file changed, 4 insertions(+)

@@ -1078,10 +1078,12 @@ static void bcm2835_pll_divider_off(stru
 	struct bcm2835_cprman *cprman = divider->cprman;
 	const struct bcm2835_pll_divider_data *data = divider->data;
 
+	spin_lock(&cprman->regs_lock);
 	cprman_write(cprman, data->cm_reg,
 		     (cprman_read(cprman, data->cm_reg) &
 		      ~data->load_mask) | data->hold_mask);
 	cprman_write(cprman, data->a2w_reg, A2W_PLL_CHANNEL_DISABLE);
+	spin_unlock(&cprman->regs_lock);
 }
 
 static int bcm2835_pll_divider_on(struct clk_hw *hw)

@@ -1090,12 +1092,14 @@ static int bcm2835_pll_divider_on(struct
 	struct bcm2835_cprman *cprman = divider->cprman;
 	const struct bcm2835_pll_divider_data *data = divider->data;
 
+	spin_lock(&cprman->regs_lock);
 	cprman_write(cprman, data->a2w_reg,
 		     cprman_read(cprman, data->a2w_reg) &
 		     ~A2W_PLL_CHANNEL_DISABLE);
 
 	cprman_write(cprman, data->cm_reg,
 		     cprman_read(cprman, data->cm_reg) & ~data->hold_mask);
+	spin_unlock(&cprman->regs_lock);
 
 	return 0;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.5/clk-bcm2835-add-locking-to-pll-_on-off-methods.patch