Re: [PATCH 4/7] coresight: etm4x: Change etm4_platform_driver driver for MMIO devices

[Anshuman Khandual <anshuman.khandual@arm.com>]

On 3/18/23 15:54, kernel test robot wrote:
> Hi Anshuman,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> [auto build test WARNING on robh/for-next]
> [also build test WARNING on soc/for-next rafael-pm/linux-next linus/master v6.3-rc2 next-20230317]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Anshuman-Khandual/coresight-etm4x-Allocate-and-device-assign-struct-etmv4_drvdata-earlier/20230317-110755
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
> patch link:    https://lore.kernel.org/r/20230317030501.1811905-5-anshuman.khandual%40arm.com
> patch subject: [PATCH 4/7] coresight: etm4x: Change etm4_platform_driver driver for MMIO devices
> config: arm64-buildonly-randconfig-r002-20230312 (https://download.01.org/0day-ci/archive/20230318/202303181800.KxbuwjRT-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install arm64 cross compiling tool for clang build
>         # apt-get install binutils-aarch64-linux-gnu
>         # https://github.com/intel-lab-lkp/linux/commit/f02ad9e7f97ab4fc1f90c7e6399004e9ec89ef26
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Anshuman-Khandual/coresight-etm4x-Allocate-and-device-assign-struct-etmv4_drvdata-earlier/20230317-110755
>         git checkout f02ad9e7f97ab4fc1f90c7e6399004e9ec89ef26
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/hwtracing/coresight/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202303181800.KxbuwjRT-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>>> drivers/hwtracing/coresight/coresight-etm4x-core.c:2336:32: warning: unused variable 'etm4_dev_pm_ops' [-Wunused-const-variable]
>    static const struct dev_pm_ops etm4_dev_pm_ops = {

These pm_ops needs to tagged along with the platform driver.

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 3ce2b4911a49..fe10dd91183e 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -2280,6 +2280,7 @@ static struct platform_driver etm4_platform_driver = {
                .of_match_table         = etm4_match,
                .acpi_match_table       = ACPI_PTR(etm4x_acpi_ids),
                .suppress_bind_attrs    = true,
+               .pm                     = &etm4_dev_pm_ops,
        },
 };