Aw: Re: [PATCH v6 00/11] Clean up "mediatek,larb"
flat view
From: Frank Wunderlich <hidden>
Date: 2021-07-14 11:24:04
Also in:
dri-devel, linux-devicetree, linux-iommu, linux-media, linux-mediatek, lkml
Gesendet: Mittwoch, 14. Juli 2021 um 13:18 Uhr Von: "Yong Wu" [off-list ref] 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
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