NVMe: Fix divide-by-zero in nvme_trans_io_get_num_cmds
dev->max_hw_sectors may be zero to indicate the device has no limit on
the number of sectors. nvme_trans_do_nvme_io() should use the software
limit, since this is guaranteed to be non-zero.
Reported-by: Mundu <mundu2510@gmail.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index e157e85..111c920 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -2044,7 +2044,7 @@
struct nvme_command c;
u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);
u16 control;
- u32 max_blocks = nvme_block_nr(ns, dev->max_hw_sectors);
+ u32 max_blocks = queue_max_hw_sectors(ns->queue);
num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);