[PATCH V2] venus: core: add shutdown callback for venus

[PATCH V2] venus: core: add shutdown callback for venus

[Mansur Alisha Shaik]

After the SMMU translation is disabled in the
arm-smmu shutdown callback during reboot, if
any subsystem are still alive then IOVAs they
are using will become PAs on bus, which may
lead to crash.

Below are the consumers of smmu from venus
arm-smmu: consumer: aa00000.video-codec supplier=15000000.iommu
arm-smmu: consumer: video-firmware.0 supplier=15000000.iommu

So implemented shutdown callback, which detach iommu maps.

Change-Id: I0f0f331056e0b84b92f1d86f66618d4b1caaa24a
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
---
 drivers/media/platform/qcom/venus/core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 203c653..92aac06 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -341,6 +341,16 @@ static int venus_remove(struct platform_device *pdev)
 	return ret;
 }
 
+static void venus_core_shutdown(struct platform_device *pdev)
+{
+	struct venus_core *core = platform_get_drvdata(pdev);
+	int ret;
+
+	ret = venus_remove(pdev);
+	if(ret)
+		dev_warn(core->dev, "shutdown failed \n", ret);
+}
+
 static __maybe_unused int venus_runtime_suspend(struct device *dev)
 {
 	struct venus_core *core = dev_get_drvdata(dev);
@@ -592,6 +602,7 @@ static struct platform_driver qcom_venus_driver = {
 		.of_match_table = venus_dt_match,
 		.pm = &venus_pm_ops,
 	},
+	.shutdown = venus_core_shutdown,
 };
 module_platform_driver(qcom_venus_driver);
 
-- 
2.7.4

Re: [PATCH V2] venus: core: add shutdown callback for venus

[kernel test robot]

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Hi Mansur,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v5.8 next-20200805]
[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]

url:    https://github.com/0day-ci/linux/commits/Mansur-Alisha-Shaik/venus-core-add-shutdown-callback-for-venus/20200806-114716
base:   git://linuxtv.org/media_tree.git master
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/device.h:15,
                    from include/linux/node.h:18,
                    from include/linux/cpu.h:17,
                    from include/linux/of_device.h:5,
                    from drivers/media/platform/qcom/venus/core.c:11:
   drivers/media/platform/qcom/venus/core.c: In function 'venus_core_shutdown':
>> drivers/media/platform/qcom/venus/core.c:351:23: warning: too many arguments for format [-Wformat-extra-args]
     351 |   dev_warn(core->dev, "shutdown failed \n", ret);
         |                       ^~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt'
      19 | #define dev_fmt(fmt) fmt
         |                      ^~~
   drivers/media/platform/qcom/venus/core.c:351:3: note: in expansion of macro 'dev_warn'
     351 |   dev_warn(core->dev, "shutdown failed \n", ret);
         |   ^~~~~~~~

vim +351 drivers/media/platform/qcom/venus/core.c

   343	
   344	static void venus_core_shutdown(struct platform_device *pdev)
   345	{
   346		struct venus_core *core = platform_get_drvdata(pdev);
   347		int ret;
   348	
   349		ret = venus_remove(pdev);
   350		if(ret)
 > 351			dev_warn(core->dev, "shutdown failed \n", ret);
   352	}
   353	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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