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[RFC,v5,5/8] platform/x86: intel_punit_ipc: Fix resource ioremap warning

Message ID 1e7336dd8ddc44f0e38433961c96e88afbeddad9.1507414288.git.sathyanarayanan.kuppuswamy@linux.intel.com (mailing list archive)
State Superseded, archived
Delegated to: Andy Shevchenko
Headers show

Commit Message

Kuppuswamy Sathyanarayanan Oct. 7, 2017, 10:19 p.m. UTC 
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@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.kuppuswamy@linux.intel.com>
---
 drivers/platform/x86/intel_punit_ipc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Changes since v4:
 * None
diff mbox

Patch

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;