kexec relies on disabling bus mastering on PCI devices to block wayward DMAs
left set by the previous kernel. However the drm midlayer was enabling bus
mastering for all PCI drivers before calling into them. This meant no matter
what they did, there was always going to be a small race window. The
f
kexec relies on disabling bus mastering on PCI devices to block wayward DMAs
left set by the previous kernel. However the drm midlayer was enabling bus
mastering for all PCI drivers before calling into them. This meant no matter
what they did, there was always going to be a small race window. The
f
