* drivers/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here
@ 2021-03-14 22:44 kernel test robot
0 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2021-03-14 22:44 UTC (permalink / raw)
To: Joerg Roedel; +Cc: kbuild-all, clang-built-linux, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 4698 bytes --]
Hi Joerg,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 1e28eed17697bcf343c6743f0028cc3b5dd88bf0
commit: 56fbacc9bf23d372d78eef3809c1ac93d88e11f4 Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
date: 8 months ago
config: riscv-randconfig-r022-20210315 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7ee96429a0b057bcc97331a6a762fc3cd00aed61)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=56fbacc9bf23d372d78eef3809c1ac93d88e11f4
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 56fbacc9bf23d372d78eef3809c1ac93d88e11f4
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
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/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here [-Wuninitialized]
priv->mapping = mapping;
^~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:136:16: note: initialize the variable 'mapping' to silence this warning
void *mapping;
^
= NULL
1 warning generated.
vim +/mapping +146 drivers/gpu/drm/exynos/exynos_drm_dma.c
237556962e5115 Andrzej Hajda 2018-10-12 120
07dc3678bacc2a Marek Szyprowski 2020-03-09 121 int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
07dc3678bacc2a Marek Szyprowski 2020-03-09 122 void **dma_priv)
237556962e5115 Andrzej Hajda 2018-10-12 123 {
237556962e5115 Andrzej Hajda 2018-10-12 124 struct exynos_drm_private *priv = drm->dev_private;
237556962e5115 Andrzej Hajda 2018-10-12 125
237556962e5115 Andrzej Hajda 2018-10-12 126 if (!priv->dma_dev) {
237556962e5115 Andrzej Hajda 2018-10-12 127 priv->dma_dev = dev;
237556962e5115 Andrzej Hajda 2018-10-12 128 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
237556962e5115 Andrzej Hajda 2018-10-12 129 dev_name(dev));
237556962e5115 Andrzej Hajda 2018-10-12 130 }
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 131
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 132 if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 133 return 0;
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 134
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 135 if (!priv->mapping) {
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 136 void *mapping;
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 137
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 138 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 139 mapping = arm_iommu_create_mapping(&platform_bus_type,
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 140 EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 141 else if (IS_ENABLED(CONFIG_IOMMU_DMA))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 142 mapping = iommu_get_domain_for_dev(priv->dma_dev);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 143
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 144 if (IS_ERR(mapping))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 145 return PTR_ERR(mapping);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 @146 priv->mapping = mapping;
237556962e5115 Andrzej Hajda 2018-10-12 147 }
237556962e5115 Andrzej Hajda 2018-10-12 148
07dc3678bacc2a Marek Szyprowski 2020-03-09 149 return drm_iommu_attach_device(drm, dev, dma_priv);
237556962e5115 Andrzej Hajda 2018-10-12 150 }
237556962e5115 Andrzej Hajda 2018-10-12 151
:::::: The code at line 146 was first introduced by commit
:::::: 67fbf3a3ef84436c58b5ead53b4b866125ad7ce9 drm/exynos/iommu: merge IOMMU and DMA code
:::::: TO: Andrzej Hajda <a.hajda@samsung.com>
:::::: CC: Inki Dae <inki.dae@samsung.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 32785 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* drivers/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here
@ 2021-01-07 16:41 kernel test robot
0 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2021-01-07 16:41 UTC (permalink / raw)
To: Joerg Roedel; +Cc: kbuild-all, clang-built-linux, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 4686 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
commit: 56fbacc9bf23d372d78eef3809c1ac93d88e11f4 Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
date: 5 months ago
config: powerpc-randconfig-r001-20210107 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5c951623bc8965fa1e89660f2f5f4a2944e4981a)
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 powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=56fbacc9bf23d372d78eef3809c1ac93d88e11f4
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 56fbacc9bf23d372d78eef3809c1ac93d88e11f4
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
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/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here [-Wuninitialized]
priv->mapping = mapping;
^~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:136:16: note: initialize the variable 'mapping' to silence this warning
void *mapping;
^
= NULL
1 warning generated.
vim +/mapping +146 drivers/gpu/drm/exynos/exynos_drm_dma.c
237556962e51150 Andrzej Hajda 2018-10-12 120
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 121 int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 122 void **dma_priv)
237556962e51150 Andrzej Hajda 2018-10-12 123 {
237556962e51150 Andrzej Hajda 2018-10-12 124 struct exynos_drm_private *priv = drm->dev_private;
237556962e51150 Andrzej Hajda 2018-10-12 125
237556962e51150 Andrzej Hajda 2018-10-12 126 if (!priv->dma_dev) {
237556962e51150 Andrzej Hajda 2018-10-12 127 priv->dma_dev = dev;
237556962e51150 Andrzej Hajda 2018-10-12 128 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
237556962e51150 Andrzej Hajda 2018-10-12 129 dev_name(dev));
237556962e51150 Andrzej Hajda 2018-10-12 130 }
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 131
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 132 if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 133 return 0;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 134
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 135 if (!priv->mapping) {
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 136 void *mapping;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 137
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 138 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 139 mapping = arm_iommu_create_mapping(&platform_bus_type,
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 140 EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 141 else if (IS_ENABLED(CONFIG_IOMMU_DMA))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 142 mapping = iommu_get_domain_for_dev(priv->dma_dev);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 143
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 144 if (IS_ERR(mapping))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 145 return PTR_ERR(mapping);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 @146 priv->mapping = mapping;
237556962e51150 Andrzej Hajda 2018-10-12 147 }
237556962e51150 Andrzej Hajda 2018-10-12 148
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 149 return drm_iommu_attach_device(drm, dev, dma_priv);
237556962e51150 Andrzej Hajda 2018-10-12 150 }
237556962e51150 Andrzej Hajda 2018-10-12 151
:::::: The code at line 146 was first introduced by commit
:::::: 67fbf3a3ef84436c58b5ead53b4b866125ad7ce9 drm/exynos/iommu: merge IOMMU and DMA code
:::::: TO: Andrzej Hajda <a.hajda@samsung.com>
:::::: CC: Inki Dae <inki.dae@samsung.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 41513 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* drivers/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here
@ 2020-10-03 17:31 kernel test robot
0 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2020-10-03 17:31 UTC (permalink / raw)
To: Robin Murphy; +Cc: kbuild-all, clang-built-linux, linux-kernel, Joerg Roedel
[-- Attachment #1: Type: text/plain, Size: 4618 bytes --]
Hi Robin,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d3d45f8220d60a0b2aaaacf8fb2be4e6ffd9008e
commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs
date: 3 months ago
config: x86_64-randconfig-a011-20201004 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bcd05599d0e53977a963799d6ee4f6e0bc21331b)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
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/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here [-Wuninitialized]
priv->mapping = mapping;
^~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:136:16: note: initialize the variable 'mapping' to silence this warning
void *mapping;
^
= NULL
1 warning generated.
vim +/mapping +146 drivers/gpu/drm/exynos/exynos_drm_dma.c
237556962e51150 Andrzej Hajda 2018-10-12 120
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 121 int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 122 void **dma_priv)
237556962e51150 Andrzej Hajda 2018-10-12 123 {
237556962e51150 Andrzej Hajda 2018-10-12 124 struct exynos_drm_private *priv = drm->dev_private;
237556962e51150 Andrzej Hajda 2018-10-12 125
237556962e51150 Andrzej Hajda 2018-10-12 126 if (!priv->dma_dev) {
237556962e51150 Andrzej Hajda 2018-10-12 127 priv->dma_dev = dev;
237556962e51150 Andrzej Hajda 2018-10-12 128 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
237556962e51150 Andrzej Hajda 2018-10-12 129 dev_name(dev));
237556962e51150 Andrzej Hajda 2018-10-12 130 }
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 131
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 132 if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 133 return 0;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 134
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 135 if (!priv->mapping) {
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 136 void *mapping;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 137
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 138 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 139 mapping = arm_iommu_create_mapping(&platform_bus_type,
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 140 EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 141 else if (IS_ENABLED(CONFIG_IOMMU_DMA))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 142 mapping = iommu_get_domain_for_dev(priv->dma_dev);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 143
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 144 if (IS_ERR(mapping))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 145 return PTR_ERR(mapping);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 @146 priv->mapping = mapping;
237556962e51150 Andrzej Hajda 2018-10-12 147 }
237556962e51150 Andrzej Hajda 2018-10-12 148
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 149 return drm_iommu_attach_device(drm, dev, dma_priv);
237556962e51150 Andrzej Hajda 2018-10-12 150 }
237556962e51150 Andrzej Hajda 2018-10-12 151
:::::: The code at line 146 was first introduced by commit
:::::: 67fbf3a3ef84436c58b5ead53b4b866125ad7ce9 drm/exynos/iommu: merge IOMMU and DMA code
:::::: TO: Andrzej Hajda <a.hajda@samsung.com>
:::::: CC: Inki Dae <inki.dae@samsung.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 39849 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* drivers/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here
@ 2020-08-25 21:03 kernel test robot
0 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2020-08-25 21:03 UTC (permalink / raw)
To: Robin Murphy; +Cc: kbuild-all, clang-built-linux, linux-kernel, Joerg Roedel
[-- Attachment #1: Type: text/plain, Size: 4647 bytes --]
Hi Robin,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs
date: 7 weeks ago
config: x86_64-randconfig-r035-20200826 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 77e5a195f818b9ace91f7b12ab948b21d7918238)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
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/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here [-Wuninitialized]
priv->mapping = mapping;
^~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:136:16: note: initialize the variable 'mapping' to silence this warning
void *mapping;
^
= NULL
1 warning generated.
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
vim +/mapping +146 drivers/gpu/drm/exynos/exynos_drm_dma.c
237556962e51150 Andrzej Hajda 2018-10-12 120
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 121 int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 122 void **dma_priv)
237556962e51150 Andrzej Hajda 2018-10-12 123 {
237556962e51150 Andrzej Hajda 2018-10-12 124 struct exynos_drm_private *priv = drm->dev_private;
237556962e51150 Andrzej Hajda 2018-10-12 125
237556962e51150 Andrzej Hajda 2018-10-12 126 if (!priv->dma_dev) {
237556962e51150 Andrzej Hajda 2018-10-12 127 priv->dma_dev = dev;
237556962e51150 Andrzej Hajda 2018-10-12 128 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
237556962e51150 Andrzej Hajda 2018-10-12 129 dev_name(dev));
237556962e51150 Andrzej Hajda 2018-10-12 130 }
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 131
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 132 if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 133 return 0;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 134
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 135 if (!priv->mapping) {
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 136 void *mapping;
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 137
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 138 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 139 mapping = arm_iommu_create_mapping(&platform_bus_type,
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 140 EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 141 else if (IS_ENABLED(CONFIG_IOMMU_DMA))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 142 mapping = iommu_get_domain_for_dev(priv->dma_dev);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 143
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 144 if (IS_ERR(mapping))
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 145 return PTR_ERR(mapping);
67fbf3a3ef84436 Andrzej Hajda 2018-10-12 @146 priv->mapping = mapping;
237556962e51150 Andrzej Hajda 2018-10-12 147 }
237556962e51150 Andrzej Hajda 2018-10-12 148
07dc3678bacc2a7 Marek Szyprowski 2020-03-09 149 return drm_iommu_attach_device(drm, dev, dma_priv);
237556962e51150 Andrzej Hajda 2018-10-12 150 }
237556962e51150 Andrzej Hajda 2018-10-12 151
:::::: The code at line 146 was first introduced by commit
:::::: 67fbf3a3ef84436c58b5ead53b4b866125ad7ce9 drm/exynos/iommu: merge IOMMU and DMA code
:::::: TO: Andrzej Hajda <a.hajda@samsung.com>
:::::: CC: Inki Dae <inki.dae@samsung.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 41030 bytes --]
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* drivers/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here
@ 2020-08-25 18:13 kernel test robot
0 siblings, 0 replies; 5+ messages in thread
From: kernel test robot @ 2020-08-25 18:13 UTC (permalink / raw)
To: Robin Murphy; +Cc: kbuild-all, clang-built-linux, linux-kernel, Joerg Roedel
[-- Attachment #1: Type: text/plain, Size: 4565 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs
date: 7 weeks ago
config: x86_64-randconfig-r035-20200826 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 77e5a195f818b9ace91f7b12ab948b21d7918238)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
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/gpu/drm/exynos/exynos_drm_dma.c:146:19: warning: variable 'mapping' is uninitialized when used here [-Wuninitialized]
priv->mapping = mapping;
^~~~~~~
drivers/gpu/drm/exynos/exynos_drm_dma.c:136:16: note: initialize the variable 'mapping' to silence this warning
void *mapping;
^
= NULL
1 warning generated.
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
vim +/mapping +146 drivers/gpu/drm/exynos/exynos_drm_dma.c
237556962e5115 Andrzej Hajda 2018-10-12 120
07dc3678bacc2a Marek Szyprowski 2020-03-09 121 int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
07dc3678bacc2a Marek Szyprowski 2020-03-09 122 void **dma_priv)
237556962e5115 Andrzej Hajda 2018-10-12 123 {
237556962e5115 Andrzej Hajda 2018-10-12 124 struct exynos_drm_private *priv = drm->dev_private;
237556962e5115 Andrzej Hajda 2018-10-12 125
237556962e5115 Andrzej Hajda 2018-10-12 126 if (!priv->dma_dev) {
237556962e5115 Andrzej Hajda 2018-10-12 127 priv->dma_dev = dev;
237556962e5115 Andrzej Hajda 2018-10-12 128 DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
237556962e5115 Andrzej Hajda 2018-10-12 129 dev_name(dev));
237556962e5115 Andrzej Hajda 2018-10-12 130 }
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 131
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 132 if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 133 return 0;
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 134
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 135 if (!priv->mapping) {
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 136 void *mapping;
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 137
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 138 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 139 mapping = arm_iommu_create_mapping(&platform_bus_type,
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 140 EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 141 else if (IS_ENABLED(CONFIG_IOMMU_DMA))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 142 mapping = iommu_get_domain_for_dev(priv->dma_dev);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 143
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 144 if (IS_ERR(mapping))
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 145 return PTR_ERR(mapping);
67fbf3a3ef8443 Andrzej Hajda 2018-10-12 @146 priv->mapping = mapping;
237556962e5115 Andrzej Hajda 2018-10-12 147 }
237556962e5115 Andrzej Hajda 2018-10-12 148
07dc3678bacc2a Marek Szyprowski 2020-03-09 149 return drm_iommu_attach_device(drm, dev, dma_priv);
237556962e5115 Andrzej Hajda 2018-10-12 150 }
237556962e5115 Andrzej Hajda 2018-10-12 151
:::::: The code at line 146 was first introduced by commit
:::::: 67fbf3a3ef84436c58b5ead53b4b866125ad7ce9 drm/exynos/iommu: merge IOMMU and DMA code
:::::: TO: Andrzej Hajda <a.hajda@samsung.com>
:::::: CC: Inki Dae <inki.dae@samsung.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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