4.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Changpeng Liu <changpeng.liu@xxxxxxxxx> commit 223694b9ae8bfba99f3528d49d07a740af6ff95a upstream. NVMe 1.3 specification defines the Optional Admin Command Support feature flags, bit 8 set to '1' then the controller supports the Doorbell Buffer Config command. Bit 7 is used for Virtualization Mangement command. Signed-off-by: Changpeng Liu <changpeng.liu@xxxxxxxxx> Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx> Reviewed-by: Max Gurtovoy <maxg@xxxxxxxxxxxx> Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx> Signed-off-by: Christoph Hellwig <hch@xxxxxx> Fixes: f9f38e33 ("nvme: improve performance for virtual NVMe devices") Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/linux/nvme.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -245,7 +245,7 @@ enum { NVME_CTRL_ONCS_WRITE_ZEROES = 1 << 3, NVME_CTRL_VWC_PRESENT = 1 << 0, NVME_CTRL_OACS_SEC_SUPP = 1 << 0, - NVME_CTRL_OACS_DBBUF_SUPP = 1 << 7, + NVME_CTRL_OACS_DBBUF_SUPP = 1 << 8, }; struct nvme_lbaf {