platform/x86: intel_pmc_ipc: adding error handling

[ Upstream commit e61985d0550df8c2078310202aaad9b41049c36c ]

If punit or telemetry device initialization fails, pmc driver should
unregister and return failure.

This change is to fix a kernel panic when removing kernel module
intel_pmc_ipc.

Fixes: 48c1917088ba ("platform:x86: Add Intel telemetry platform device")
Signed-off-by: Junxiao Chang <junxiao.chang@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
index e7edc8c..4ad9d12 100644 (file)
--- a/drivers/platform/x86/intel_pmc_ipc.c
+++ b/drivers/platform/x86/intel_pmc_ipc.c
@@ -776,13 +776,17 @@ static int ipc_create_pmc_devices(void)
        if (ret) {
                dev_err(ipcdev.dev, "Failed to add punit platform device\n");
                platform_device_unregister(ipcdev.tco_dev);
+               return ret;
        }
 
        if (!ipcdev.telem_res_inval) {
                ret = ipc_create_telemetry_device();
-               if (ret)
+               if (ret) {
                        dev_warn(ipcdev.dev,
                                "Failed to add telemetry platform device\n");
+                       platform_device_unregister(ipcdev.punit_dev);
+                       platform_device_unregister(ipcdev.tco_dev);
+               }
        }
 
        return ret;