Messages in this thread | | | Date | Mon, 14 Nov 2022 10:49:43 +0000 | Subject | Re: [PATCH v12 1/2] drivers/coresight: Add UltraSoc System Memory Buffer driver | From | Suzuki K Poulose <> |
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On 11/11/2022 22:06, kernel test robot wrote: > Hi Junhao, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on soc/for-next] > [also build test WARNING on linus/master v6.1-rc4 next-20221111] > [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/Junhao-He/Add-support-for-UltraSoc-System-Memory-Buffer/20221109-215158 > base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next > patch link: https://lore.kernel.org/r/20221109135008.9485-2-hejunhao3%40huawei.com > patch subject: [PATCH v12 1/2] drivers/coresight: Add UltraSoc System Memory Buffer driver > config: arm64-randconfig-s033-20221111 > compiler: aarch64-linux-gcc (GCC) 12.1.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # apt-get install sparse > # sparse version: v0.6.4-39-gce1a6720-dirty > # https://github.com/intel-lab-lkp/linux/commit/49ede03fd874b65deca5382ea84c3377188136da > git remote add linux-review https://github.com/intel-lab-lkp/linux > git fetch --no-tags linux-review Junhao-He/Add-support-for-UltraSoc-System-Memory-Buffer/20221109-215158 > git checkout 49ede03fd874b65deca5382ea84c3377188136da > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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> > > sparse warnings: (new ones prefixed by >>) >>> drivers/hwtracing/coresight/ultrasoc-smb.c:113:33: sparse: sparse: cast removes address space '__iomem' of expression >>> drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got void [noderef] __iomem * @@ > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: expected void const * > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: got void [noderef] __iomem * >>> drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got void [noderef] __iomem * @@ > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: expected void const * > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: got void [noderef] __iomem * > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const * @@ got void [noderef] __iomem * @@ > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: expected void const * > drivers/hwtracing/coresight/ultrasoc-smb.c:354:17: sparse: got void [noderef] __iomem * >>> drivers/hwtracing/coresight/ultrasoc-smb.c:463:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __iomem *base @@ got void * @@ > drivers/hwtracing/coresight/ultrasoc-smb.c:463:14: sparse: expected void [noderef] __iomem *base > drivers/hwtracing/coresight/ultrasoc-smb.c:463:14: sparse: got void * > > vim +/__iomem +113 drivers/hwtracing/coresight/ultrasoc-smb.c > > 89 > 90 static ssize_t smb_read(struct file *file, char __user *data, size_t len, > 91 loff_t *ppos) > 92 { > 93 struct smb_drv_data *drvdata = container_of(file->private_data, > 94 struct smb_drv_data, miscdev); > 95 struct smb_data_buffer *sdb = &drvdata->sdb; > 96 struct device *dev = &drvdata->csdev->dev; > 97 ssize_t to_copy = 0; > 98 > 99 mutex_lock(&drvdata->mutex); > 100 > 101 if (!sdb->data_size) { > 102 smb_update_data_size(drvdata); > 103 if (!sdb->data_size) > 104 goto out; > 105 } > 106 > 107 to_copy = min(sdb->data_size, len); > 108 > 109 /* Copy parts of trace data when read pointer wrap around SMB buffer */ > 110 if (sdb->rd_offset + to_copy > sdb->buf_size) > 111 to_copy = sdb->buf_size - sdb->rd_offset; > 112 > > 113 if (copy_to_user(data, (void *)sdb->buf_base + sdb->rd_offset, > 114 to_copy)) { > 115 dev_dbg(dev, "Failed to copy data to user\n"); > 116 to_copy = -EFAULT; > 117 goto out; > 118 } > 119
Please could we replace this with copy_to_user_fromio() ?
Suzuki
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