| Message ID | 20200918011357.909335-1-yukuai3@huawei.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | iommu/qcom: add missing put_device() call in qcom_iommu_of_xlate() | expand |
On Fri, Sep 18, 2020 at 09:13:57AM +0800, Yu Kuai wrote: > if of_find_device_by_node() succeed, qcom_iommu_of_xlate() doesn't have > a corresponding put_device(). Thus add put_device() to fix the exception > handling for this function implementation. > > Fixes: e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory") That's probably not accurate, in that this driver used to live under drivers/iommu/ and assumedly had this bug there as well. > Signed-off-by: Yu Kuai <yukuai3@huawei.com> > --- > drivers/iommu/arm/arm-smmu/qcom_iommu.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) I guess Rob will pick this up. Will
On Mon, Sep 21, 2020 at 10:50 AM Will Deacon <will@kernel.org> wrote: > > On Fri, Sep 18, 2020 at 09:13:57AM +0800, Yu Kuai wrote: > > if of_find_device_by_node() succeed, qcom_iommu_of_xlate() doesn't have > > a corresponding put_device(). Thus add put_device() to fix the exception > > handling for this function implementation. > > > > Fixes: e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory") > > That's probably not accurate, in that this driver used to live under > drivers/iommu/ and assumedly had this bug there as well. > > > Signed-off-by: Yu Kuai <yukuai3@huawei.com> > > --- > > drivers/iommu/arm/arm-smmu/qcom_iommu.c | 5 ++++- > > 1 file changed, 4 insertions(+), 1 deletion(-) > > I guess Rob will pick this up. Probably overkill for me to send a pull req for a single patch, if you want to pick it up: Acked-by: Rob Clark <robdclark@gmail.com>
On Mon, Sep 21, 2020 at 11:27 AM Rob Clark <robdclark@gmail.com> wrote: > > On Mon, Sep 21, 2020 at 10:50 AM Will Deacon <will@kernel.org> wrote: > > > > On Fri, Sep 18, 2020 at 09:13:57AM +0800, Yu Kuai wrote: > > > if of_find_device_by_node() succeed, qcom_iommu_of_xlate() doesn't have > > > a corresponding put_device(). Thus add put_device() to fix the exception > > > handling for this function implementation. > > > > > > Fixes: e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory") > > > > That's probably not accurate, in that this driver used to live under > > drivers/iommu/ and assumedly had this bug there as well. > > and fwiw, that looks like it should be: Fixes: 0ae349a0f33fb ("iommu/qcom: Add qcom_iommu") > > > Signed-off-by: Yu Kuai <yukuai3@huawei.com> > > > --- > > > drivers/iommu/arm/arm-smmu/qcom_iommu.c | 5 ++++- > > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > I guess Rob will pick this up. > > Probably overkill for me to send a pull req for a single patch, if you > want to pick it up: > > Acked-by: Rob Clark <robdclark@gmail.com>
On Tue, Sep 22, 2020 at 03:13:53AM +0800, kernel test robot wrote: > Thank you for the patch! Perhaps something to improve: > > [auto build test WARNING on iommu/next] > [also build test WARNING on linus/master v5.9-rc6 next-20200921] > [cannot apply to robclark/msm-next] > [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/Yu-Kuai/iommu-qcom-add-missing-put_device-call-in-qcom_iommu_of_xlate/20200918-091341 > base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next > config: arm64-randconfig-r023-20200920 (attached as .config) > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4e8c028158b56d9c2142a62464e8e0686bde3584) > 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 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>): > > >> drivers/iommu/arm/arm-smmu/qcom_iommu.c:601:4: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] > return -EINVAL; > ^ > drivers/iommu/arm/arm-smmu/qcom_iommu.c:599:3: note: previous statement is here > if (WARN_ON(qcom_iommu != dev_iommu_priv_get(dev))) Oh, this looks like a nasty bug. Seems we're missing some braces. Will
On Mon, Sep 21, 2020 at 09:45:57PM +0100, Will Deacon wrote: > On Tue, Sep 22, 2020 at 03:13:53AM +0800, kernel test robot wrote: > > Thank you for the patch! Perhaps something to improve: > > > > [auto build test WARNING on iommu/next] > > [also build test WARNING on linus/master v5.9-rc6 next-20200921] > > [cannot apply to robclark/msm-next] > > [If your patch is applied to the wrong git tree, kindly drop us a note. > > And when submitting patch, we suggest to use '--base' as documented in > > https://git-scm.com/docs/git-format-patch] > > > > url: https://github.com/0day-ci/linux/commits/Yu-Kuai/iommu-qcom-add-missing-put_device-call-in-qcom_iommu_of_xlate/20200918-091341 > > base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next > > config: arm64-randconfig-r023-20200920 (attached as .config) > > compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4e8c028158b56d9c2142a62464e8e0686bde3584) > > reproduce (this is a W=1 build): > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > > chmod +x ~/bin/make.cross > > # install arm64 cross compiling tool for clang build > > # apt-get install binutils-aarch64-linux-gnu > > # save the attached .config to linux build tree > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 > > > > 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 >>): > > > > >> drivers/iommu/arm/arm-smmu/qcom_iommu.c:601:4: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] > > return -EINVAL; > > ^ > > drivers/iommu/arm/arm-smmu/qcom_iommu.c:599:3: note: previous statement is here > > if (WARN_ON(qcom_iommu != dev_iommu_priv_get(dev))) > > Oh, this looks like a nasty bug. Seems we're missing some braces. Yu Kuai: please could you send a v2 of this? Will
On 2020/09/29 7:08, Will Deacon wrote: > On Mon, Sep 21, 2020 at 09:45:57PM +0100, Will Deacon wrote: >> On Tue, Sep 22, 2020 at 03:13:53AM +0800, kernel test robot wrote: >>> Thank you for the patch! Perhaps something to improve: >>> >>> [auto build test WARNING on iommu/next] >>> [also build test WARNING on linus/master v5.9-rc6 next-20200921] >>> [cannot apply to robclark/msm-next] >>> [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/Yu-Kuai/iommu-qcom-add-missing-put_device-call-in-qcom_iommu_of_xlate/20200918-091341 >>> base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next >>> config: arm64-randconfig-r023-20200920 (attached as .config) >>> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4e8c028158b56d9c2142a62464e8e0686bde3584) >>> 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 >>> # save the attached .config to linux build tree >>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 >>> >>> 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 >>): >>> >>>>> drivers/iommu/arm/arm-smmu/qcom_iommu.c:601:4: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] >>> return -EINVAL; >>> ^ >>> drivers/iommu/arm/arm-smmu/qcom_iommu.c:599:3: note: previous statement is here >>> if (WARN_ON(qcom_iommu != dev_iommu_priv_get(dev))) >> >> Oh, this looks like a nasty bug. Seems we're missing some braces. > > Yu Kuai: please could you send a v2 of this? > Hi, Will Thanks for your notice, will send a V2 soon. Yu Kuai
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c index 9535a6af7553..7a9594d221e0 100644 --- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c +++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c @@ -584,8 +584,10 @@ static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) * index into qcom_iommu->ctxs: */ if (WARN_ON(asid < 1) || - WARN_ON(asid > qcom_iommu->num_ctxs)) + WARN_ON(asid > qcom_iommu->num_ctxs)) { + put_device(&iommu_pdev->dev); return -EINVAL; + } if (!dev_iommu_priv_get(dev)) { dev_iommu_priv_set(dev, qcom_iommu); @@ -595,6 +597,7 @@ static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) * banks are ok, but multiple devices are not: */ if (WARN_ON(qcom_iommu != dev_iommu_priv_get(dev))) + put_device(&iommu_pdev->dev); return -EINVAL; }
if of_find_device_by_node() succeed, qcom_iommu_of_xlate() doesn't have a corresponding put_device(). Thus add put_device() to fix the exception handling for this function implementation. Fixes: e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory") Signed-off-by: Yu Kuai <yukuai3@huawei.com> --- drivers/iommu/arm/arm-smmu/qcom_iommu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)