Patch "crypto: atmel - fix checks of error code returned by devm_ioremap_resource()" 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

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

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:
crypto-atmel-fix-checks-of-error-code-returned-by-devm_ioremap_resource.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: Vladimir Zapolskiy <[email protected]>
Date: Sun, 6 Mar 2016 03:21:52 +0200
Subject: crypto: atmel - fix checks of error code returned by devm_ioremap_resource()

From: Vladimir Zapolskiy <[email protected]>

commit 9b52d55f4f0e2bb9a34abbcf99e05e17f1b3b281 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/atmel-aes.c  |    4 ++--
 drivers/crypto/atmel-sha.c  |    4 ++--
 drivers/crypto/atmel-tdes.c |    4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

@@ -2085,9 +2085,9 @@ static int atmel_aes_probe(struct platfo
 	}
 
 	aes_dd->io_base = devm_ioremap_resource(&pdev->dev, aes_res);
-	if (!aes_dd->io_base) {
+	if (IS_ERR(aes_dd->io_base)) {
 		dev_err(dev, "can't ioremap\n");
-		err = -ENOMEM;
+		err = PTR_ERR(aes_dd->io_base);
 		goto res_err;
 	}
 

@@ -1404,9 +1404,9 @@ static int atmel_sha_probe(struct platfo
 	}
 
 	sha_dd->io_base = devm_ioremap_resource(&pdev->dev, sha_res);
-	if (!sha_dd->io_base) {
+	if (IS_ERR(sha_dd->io_base)) {
 		dev_err(dev, "can't ioremap\n");
-		err = -ENOMEM;
+		err = PTR_ERR(sha_dd->io_base);
 		goto res_err;
 	}
 

@@ -1417,9 +1417,9 @@ static int atmel_tdes_probe(struct platf
 	}
 
 	tdes_dd->io_base = devm_ioremap_resource(&pdev->dev, tdes_res);
-	if (!tdes_dd->io_base) {
+	if (IS_ERR(tdes_dd->io_base)) {
 		dev_err(dev, "can't ioremap\n");
-		err = -ENOMEM;
+		err = PTR_ERR(tdes_dd->io_base);
 		goto res_err;
 	}
 

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

queue-4.5/crypto-atmel-fix-checks-of-error-code-returned-by-devm_ioremap_resource.patch queue-4.5/crypto-ux500-fix-checks-of-error-code-returned-by-devm_ioremap_resource.patch