Thomas there is 2 more bugs:
In ttm_bo_mmap if the bo = NULL after ttm_bo_vm_lookup_rb
then
if (unlikely(bo == NULL)) {
printk(KERN_ERR "Could not find buffer object to map.\n");
goto out_unref;
}
Should be
if (unlikely(bo == NULL)) {
printk(KERN_ERR "Could not find buffer object to map.\n");
return -EINVAL;
}
Otherwise you unref a null bo and bad things happen.
In ttm_mem_reg_is_pci i think it should return false if
flags TTM_MEMTYPE_FLAG_NEEDS_IOREMAP is not set otherwise
kmap on a gart (unmappable to cpu) will think it needs
to use ioremap which fails.
Cheers,
Jerome Glisse <[email protected]>
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