Patch "fpga: altera-hps2fpga: fix multiple init of l3_remap_lock" has been added to the 4.12-stable tree

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

fpga: altera-hps2fpga: fix multiple init of l3_remap_lock

to the 4.12-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:
fpga-altera-hps2fpga-fix-multiple-init-of-l3_remap_lock.patch
and it can be found in the queue-4.12 subdirectory.

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

From: Ian Abbott <[email protected]>
Date: Tue, 1 Aug 2017 21:20:54 -0500
Subject: fpga: altera-hps2fpga: fix multiple init of l3_remap_lock

From: Ian Abbott <[email protected]>

commit 4ae2bd4b3ada3dfd80ca8110b4f567752966ca1e upstream.

The global spinlock l3_remap_lock is reinitialized every time the "probe" function alt_fpga_bridge_probe() is called. It should only be initialized once. Use DEFINE_SPINLOCK() to initialize it statically.

---
 drivers/fpga/altera-hps2fpga.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

@@ -66,7 +66,7 @@ static int alt_hps2fpga_enable_show(stru
 
 /* The L3 REMAP register is write only, so keep a cached value. */
 static unsigned int l3_remap_shadow;
-static spinlock_t l3_remap_lock;
+static DEFINE_SPINLOCK(l3_remap_lock);
 
 static int _alt_hps2fpga_enable_set(struct altera_hps2fpga_data *priv,
 				    bool enable)

@@ -171,8 +171,6 @@ static int alt_fpga_bridge_probe(struct
 		return -EBUSY;
 	}
 
-	spin_lock_init(&l3_remap_lock);
-
 	if (!of_property_read_u32(dev->of_node, "bridge-enable", &enable)) {
 		if (enable > 1) {
 			dev_warn(dev, "invalid bridge-enable %u > 1\n", enable);

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

queue-4.12/fpga-altera-hps2fpga-fix-multiple-init-of-l3_remap_lock.patch