Patch "crypto: ux500 - fix checks of error code returned by devm_ioremap_resource()" has been added to the 4.4-stable tree

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

crypto: ux500 - fix checks of error code returned by devm_ioremap_resource()

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:
crypto-ux500-fix-checks-of-error-code-returned-by-devm_ioremap_resource.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 <[email protected]> know about it.

From: Vladimir Zapolskiy <[email protected]>
Date: Sun, 6 Mar 2016 03:22:04 +0200
Subject: crypto: ux500 - fix checks of error code returned by devm_ioremap_resource()

From: Vladimir Zapolskiy <[email protected]>

commit b62917a2622ebcb03a500ef20da47be80d8c8951 upstream.

The change fixes potential oops while accessing iomem on invalid address, if devm_ioremap_resource() fails due to some reason.

The devm_ioremap_resource() function returns ERR_PTR() and never returns NULL, which makes useless a following check for NULL.

---
 drivers/crypto/ux500/cryp/cryp_core.c |    4 ++--
 drivers/crypto/ux500/hash/hash_core.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

@@ -1440,9 +1440,9 @@ static int ux500_cryp_probe(struct platf
 
 	device_data->phybase = res->start;
 	device_data->base = devm_ioremap_resource(dev, res);
-	if (!device_data->base) {
+	if (IS_ERR(device_data->base)) {
 		dev_err(dev, "[%s]: ioremap failed!", __func__);
-		ret = -ENOMEM;
+		ret = PTR_ERR(device_data->base);
 		goto out;
 	}
 

@@ -1675,9 +1675,9 @@ static int ux500_hash_probe(struct platf
 
 	device_data->phybase = res->start;
 	device_data->base = devm_ioremap_resource(dev, res);
-	if (!device_data->base) {
+	if (IS_ERR(device_data->base)) {
 		dev_err(dev, "%s: ioremap() failed!\n", __func__);
-		ret = -ENOMEM;
+		ret = PTR_ERR(device_data->base);
 		goto out;
 	}
 	spin_lock_init(&device_data->ctx_lock);

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

queue-4.4/crypto-atmel-fix-checks-of-error-code-returned-by-devm_ioremap_resource.patch queue-4.4/crypto-ux500-fix-checks-of-error-code-returned-by-devm_ioremap_resource.patch