Patch "platform/x86: intel_punit_ipc: Fix resource ioremap warning" has been added to the 4.14-stable tree

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

platform/x86: intel_punit_ipc: Fix resource ioremap warning

to the 4.14-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:
platform-x86-intel_punit_ipc-fix-resource-ioremap-warning.patch
and it can be found in the queue-4.14 subdirectory.

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

From: Kuppuswamy Sathyanarayanan <[email protected]>
Date: Sun, 29 Oct 2017 02:49:54 -0700
Subject: platform/x86: intel_punit_ipc: Fix resource ioremap warning

From: Kuppuswamy Sathyanarayanan <[email protected]>

[ Upstream commit 6cc8cbbc8868033f279b63e98b26b75eaa0006ab ]

For PUNIT device, ISPDRIVER_IPC and GTDDRIVER_IPC resources are not mandatory. So when PMC IPC driver creates a PUNIT device, if these resources are not available then it creates dummy resource entries for these missing resources. But during PUNIT device probe, doing ioremap on these dummy resources generates following warning messages.

intel_punit_ipc: can't request region for resource [mem 0x00000000]
intel_punit_ipc: can't request region for resource [mem 0x00000000]
intel_punit_ipc: can't request region for resource [mem 0x00000000]
intel_punit_ipc: can't request region for resource [mem 0x00000000]

This patch fixes this issue by adding extra check for resource size before performing ioremap operation.

---
 drivers/platform/x86/intel_punit_ipc.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

@@ -252,28 +252,28 @@ static int intel_punit_get_bars(struct p
 	 * - GTDRIVER_IPC BASE_IFACE
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	if (res) {
+	if (res && resource_size(res) > 1) {
 		addr = devm_ioremap_resource(&pdev->dev, res);
 		if (!IS_ERR(addr))
 			punit_ipcdev->base[ISPDRIVER_IPC][BASE_DATA] = addr;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
-	if (res) {
+	if (res && resource_size(res) > 1) {
 		addr = devm_ioremap_resource(&pdev->dev, res);
 		if (!IS_ERR(addr))
 			punit_ipcdev->base[ISPDRIVER_IPC][BASE_IFACE] = addr;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
-	if (res) {
+	if (res && resource_size(res) > 1) {
 		addr = devm_ioremap_resource(&pdev->dev, res);
 		if (!IS_ERR(addr))
 			punit_ipcdev->base[GTDRIVER_IPC][BASE_DATA] = addr;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
-	if (res) {
+	if (res && resource_size(res) > 1) {
 		addr = devm_ioremap_resource(&pdev->dev, res);
 		if (!IS_ERR(addr))
 			punit_ipcdev->base[GTDRIVER_IPC][BASE_IFACE] = addr;

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

queue-4.14/platform-x86-intel_punit_ipc-fix-resource-ioremap-warning.patch