platform/x86: intel_punit_ipc: Fix resource ioremap warning

[ 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.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/platform/x86/intel_punit_ipc.c b/drivers/platform/x86/intel_punit_ipc.c
index a47a41fc10ad77c427158811857da4bc21cd747f..b5b890127479f8f586880762828bbd447a383ddf 100644 (file)
--- a/drivers/platform/x86/intel_punit_ipc.c
+++ b/drivers/platform/x86/intel_punit_ipc.c
@@ -252,28 +252,28 @@ static int intel_punit_get_bars(struct platform_device *pdev)
         * - 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;