On Tue, Apr 03, 2018 at 10:01:05PM +0100, Ben Hutchings wrote: > On Fri, 2018-03-23 at 10:54 +0100, Greg Kroah-Hartman wrote: > > 4.4-stable review patch. If anyone has any objections, please let me know. > > > > ------------------ > > > > From: Ming Lei <ming.lei@xxxxxxxxxx> > > > > > > [ Upstream commit a4e84aae8139aca9fbfbced1f45c51ca81b57488 ] > > > > mtip32xx supposes that 'request_idx' passed to .init_request() > > is tag of the request, and use that as request's tag to initialize > > command header. > > > > After MQ IO scheduler is in, request tag assigned isn't same with > > the request index anymore, so cause strange hardware failure on > > mtip32xx, even whole system panic is triggered. > [...] > > MQ IO schedulers were introduced in 4.11, so this shouldn't be needed > in older branches. It also causes a performance regression (fixed > upstream). Please revert this for 4.4 and 4.9. Now reverted, thanks. greg k-h