14 Jul
2021
14 Jul
'21
11:23 a.m.
Gesendet: Mittwoch, 14. Juli 2021 um 13:18 Uhr Von: "Yong Wu" yong.wu@mediatek.com Hi Frank,
Thanks for your report. mt7623 use mtk_iommu_v1.c.
I will try to reproduce this locally.
Hi,
as far as i have debugged it dev->iommu_group is NULL, so it crashes on first access (dev_info)
drivers/iommu/iommu.c:
923 void iommu_group_remove_device(struct device *dev) 924 { 925 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 926 struct iommu_group *group = dev->iommu_group; 927 struct group_device *tmp_device, *device = NULL; 928 929 printk(KERN_ALERT "DEBUG: Passed %s %d 0x%08x\n",__FUNCTION__,__LINE__,(unsigned int)group); 930 dev_info(dev, "Removing from iommu group %d\n", group->id);
regards Frank