Merge tag 'nvme-6.3-2023-02-15' of git://git.infradead.org/nvme into for-6.3/block

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.3

 - fix and cleanup freeing single sgl (Keith Busch)"

* tag 'nvme-6.3-2023-02-15' of git://git.infradead.org/nvme:
  nvme-pci: remove iod use_sgls
  nvme-pci: fix freeing single sgl

Author: axboe

drivers/nvme/host/pci.c

@@ -230,7 +230,6 @@ union nvme_descriptor {
 struct nvme_iod {
 	struct nvme_request req;
 	struct nvme_command cmd;
-	bool use_sgl;
 	bool aborted;
 	s8 nr_allocations;	/* PRP list pool allocations. 0 means small
 				   pool in use */
@@ -556,7 +555,7 @@ static void nvme_unmap_data(struct nvme_dev *dev, struct request *req)
 	if (iod->nr_allocations == 0)
 		dma_pool_free(dev->prp_small_pool, iod->list[0].sg_list,
 			      iod->first_dma);
-	else if (iod->use_sgl)
+	else if (iod->nr_allocations == 1)
 		dma_pool_free(dev->prp_page_pool, iod->list[0].sg_list,
 			      iod->first_dma);
 	else
@@ -808,8 +807,7 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req,
 		goto out_free_sg;
 	}
 
-	iod->use_sgl = nvme_pci_use_sgls(dev, req, iod->sgt.nents);
-	if (iod->use_sgl)
+	if (nvme_pci_use_sgls(dev, req, iod->sgt.nents))
 		ret = nvme_pci_setup_sgls(dev, req, &cmnd->rw);
 	else
 		ret = nvme_pci_setup_prps(dev, req, &cmnd->rw);