On Tue, Jun 19, 2018 at 06:23:06PM +0100, Ben Hutchings wrote: > From: Keith Busch <keith.busch@xxxxxxxxx> > > commit 161b8be2bd6abad250d4b3f674bdd5480f15beeb upstream. > > A spurious interrupt before the nvme driver has initialized the completion > queue may inadvertently cause the driver to believe it has a completion > to process. This may result in a NULL dereference since the nvmeq's tags > are not set at this point. > > The patch initializes the host's CQ memory so that a spurious interrupt > isn't mistaken for a real completion. > > Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx> > Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx> > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > [bwh: Backported to 4.4: adjust context] > Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> > --- > drivers/nvme/host/pci.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) Now applied, thanks. greg k-h
