On Wed, Mar 27, 2019 at 5:10 AM <junxiao.chang@xxxxxxxxx> wrote:
>
> From: Junxiao Chang <junxiao.chang@xxxxxxxxx>
>
> 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.
Can you provide a Fixes tag?
>
> Signed-off-by: Junxiao Chang <junxiao.chang@xxxxxxxxx>
> ---
> drivers/platform/x86/intel_pmc_ipc.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
> index ffe0cac..c6d09ad 100644
> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ b/drivers/platform/x86/intel_pmc_ipc.c
> @@ -789,13 +789,17 @@ 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;
> --
> 2.7.4
>
--
With Best Regards,
Andy Shevchenko
