[RFC v4 5/8] platform/x86: intel_punit_ipc: Fix resource ioremap warning

[sathyanarayanan . kuppuswamy]

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppusw...@linux.intel.com>

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 intel_punit_ipc: can't request region for resource [mem
0x00000000]
intel_punit_ipc intel_punit_ipc: can't request region for resource [mem
0x00000000]
intel_punit_ipc intel_punit_ipc: can't request region for resource [mem
0x00000000]
intel_punit_ipc 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.kuppusw...@linux.intel.com>
---
 drivers/platform/x86/intel_punit_ipc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/intel_punit_ipc.c 
b/drivers/platform/x86/intel_punit_ipc.c
index a47a41f..b5b8901 100644
--- 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;
-- 
2.7.4