On Tue, Dec 19, 2017 at 11:28:49AM +0000, Bharat Kumar Gogada wrote: > In our case the peripheral returns SLVERR first time and we see the following > print but kernel do not hang. > [ 231.484186] Unhandled fault: synchronous external abort > (0x92000210) at 0x0000007f9241f880 Bus error > > And from simulation we know that subsequent access to peripheral > returns OKAY response, however we see subsequent access fail with same > above bus error when we boot Linux. > > Is there a way to handle these synchronous abort gracefully in Linux > or are these fatal ?
We don't currently have any mechanism to handle these, though it might be possible for synchronous abort. Since currently there is no mechanism to handle, if once synchronous abort is received from a peripheral, consecutive access will show up same error even peripheral responds with OKAY ? What are the possible ways for handling these ? Do you know why the device is returning SLVERR in this case? There is an error being detected by the device. Bharat
