From 7fad1fd46ccf3ee283052e948cf91edd0cd9b1c7 Mon Sep 17 00:00:00 2001 From: Jon Derrick <jonathan.derrick@intel.com> Date: Mon, 24 Apr 2017 18:02:43 -0600 Subject: nvme-scsi: Consider LBA format in IO splitting calculation The current command submission code uses a sector-based value when considering the maximum number of blocks per command. With a 4k-formatted namespace and a command exceeding max hardware limits, this calculation doesn't split IOs which should be split and fails in the nvme layer. This patch fixes that calculation and enables IO splitting in these circumstances. Signed-off-by: Jon Derrick <jonathan.derrick@intel.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/nvme/host/scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/nvme') diff --git a/drivers/nvme/host/scsi.c b/drivers/nvme/host/scsi.c index f49ae2758bb7..988da610d6aa 100644 --- a/drivers/nvme/host/scsi.c +++ b/drivers/nvme/host/scsi.c @@ -1609,7 +1609,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, struct nvme_command c; u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read); u16 control; - u32 max_blocks = queue_max_hw_sectors(ns->queue); + u32 max_blocks = queue_max_hw_sectors(ns->queue) >> (ns->lba_shift - 9); num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks); -- cgit v1.2.3-70-g09d2