tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 9ccce092fc64d19504fa54de4fd659e279cc92e7
commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs
config: microblaze-randconfig-m031-20210503 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
smatch warnings:
drivers/gpu/drm/exynos/exynos_drm_dma.c:144 exynos_drm_register_dma() error: uninitialized symbol 'mapping'.
vim +/mapping +144 drivers/gpu/drm/exynos/exynos_drm_dma.c
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
Both CONFIG_ options disabled in the attached .config file.
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 }
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0-DAY CI Kernel Test Service, Intel Corporation
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