block: switch numa_node to int in blk_mq_hw_ctx and init_request

numa_node in blk_mq_hw_ctx and the matching argument of
blk_mq_ops::init_request can be NUMA_NO_NODE (-1).  Declared as
unsigned int, NUMA_NO_NODE becomes UINT_MAX and walks off
nvme_dev::descriptor_pools[] on CONFIG_NUMA=n [1].

Switch the field and the callback prototype to int and update all
in-tree init_request implementations.  No functional change:
cpu_to_node(), kmalloc_node() and blk_alloc_flush_queue() already
take int.

Link: https://lore.kernel.org/linux-nvme/20260522150628.399288-1-mateusz.nowicki@posteo.net/ [1]
Link: https://lore.kernel.org/linux-nvme/20260309062840.2937858-2-iam@sung-woo.kim/
Suggested-by: Caleb Sander Mateos <csander@purestorage.com>
Suggested-by: Sung-woo Kim <iam@sung-woo.kim>
Signed-off-by: Mateusz Nowicki <mateusz.nowicki@posteo.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260523125210.272274-1-mateusz.nowicki@posteo.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/bsg-lib.c

@@ -299,7 +299,7 @@ out:
 
 /* called right after the request is allocated for the request_queue */
 static int bsg_init_rq(struct blk_mq_tag_set *set, struct request *req,
-		       unsigned int hctx_idx, unsigned int numa_node)
+		       unsigned int hctx_idx, int numa_node)
 {
 	struct bsg_job *job = blk_mq_rq_to_pdu(req);
 

drivers/block/mtip32xx/mtip32xx.c

@@ -3340,7 +3340,7 @@ static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq,
 }
 
 static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
-			 unsigned int hctx_idx, unsigned int numa_node)
+			 unsigned int hctx_idx, int numa_node)
 {
 	struct driver_data *dd = set->driver_data;
 	struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);

drivers/block/nbd.c

@@ -1888,7 +1888,7 @@ static void nbd_dbg_close(void)
 #endif
 
 static int nbd_init_request(struct blk_mq_tag_set *set, struct request *rq,
-			    unsigned int hctx_idx, unsigned int numa_node)
+			    unsigned int hctx_idx, int numa_node)
 {
 	struct nbd_cmd *cmd = blk_mq_rq_to_pdu(rq);
 	cmd->nbd = set->driver_data;

drivers/md/dm-rq.c

@@ -462,7 +462,7 @@ static void dm_start_request(struct mapped_device *md, struct request *orig)
 }
 
 static int dm_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
-			      unsigned int hctx_idx, unsigned int numa_node)
+			      unsigned int hctx_idx, int numa_node)
 {
 	struct mapped_device *md = set->driver_data;
 	struct dm_rq_target_io *tio = blk_mq_rq_to_pdu(rq);

drivers/mmc/core/queue.c

@@ -208,7 +208,7 @@ static unsigned short mmc_get_max_segments(struct mmc_host *host)
 }
 
 static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req,
-			       unsigned int hctx_idx, unsigned int numa_node)
+			       unsigned int hctx_idx, int numa_node)
 {
 	struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
 	struct mmc_queue *mq = set->driver_data;

drivers/mtd/ubi/block.c

@@ -312,7 +312,7 @@ static blk_status_t ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
 
 static int ubiblock_init_request(struct blk_mq_tag_set *set,
 		struct request *req, unsigned int hctx_idx,
-		unsigned int numa_node)
+		int numa_node)
 {
 	struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
 

drivers/nvme/host/apple.c

@@ -819,7 +819,7 @@ static int apple_nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
 
 static int apple_nvme_init_request(struct blk_mq_tag_set *set,
 				   struct request *req, unsigned int hctx_idx,
-				   unsigned int numa_node)
+				   int numa_node)
 {
 	struct apple_nvme_queue *q = set->driver_data;
 	struct apple_nvme *anv = queue_to_apple_nvme(q);

drivers/nvme/host/fc.c

@@ -2109,7 +2109,7 @@ out_on_error:
 
 static int
 nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq,
-		unsigned int hctx_idx, unsigned int numa_node)
+		unsigned int hctx_idx, int numa_node)
 {
 	struct nvme_fc_ctrl *ctrl = to_fc_ctrl(set->driver_data);
 	struct nvme_fcp_op_w_sgl *op = blk_mq_rq_to_pdu(rq);

drivers/nvme/host/pci.c

@@ -660,7 +660,7 @@ static int nvme_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,
 
 static int nvme_pci_init_request(struct blk_mq_tag_set *set,
 		struct request *req, unsigned int hctx_idx,
-		unsigned int numa_node)
+		int numa_node)
 {
 	struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
 

drivers/nvme/host/rdma.c

@@ -292,7 +292,7 @@ static void nvme_rdma_exit_request(struct blk_mq_tag_set *set,
 
 static int nvme_rdma_init_request(struct blk_mq_tag_set *set,
 		struct request *rq, unsigned int hctx_idx,
-		unsigned int numa_node)
+		int numa_node)
 {
 	struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(set->driver_data);
 	struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);

drivers/nvme/host/tcp.c

@@ -548,7 +548,7 @@ static void nvme_tcp_exit_request(struct blk_mq_tag_set *set,
 
 static int nvme_tcp_init_request(struct blk_mq_tag_set *set,
 		struct request *rq, unsigned int hctx_idx,
-		unsigned int numa_node)
+		int numa_node)
 {
 	struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(set->driver_data);
 	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);

drivers/nvme/target/loop.c

@@ -202,7 +202,7 @@ static int nvme_loop_init_iod(struct nvme_loop_ctrl *ctrl,
 
 static int nvme_loop_init_request(struct blk_mq_tag_set *set,
 		struct request *req, unsigned int hctx_idx,
-		unsigned int numa_node)
+		int numa_node)
 {
 	struct nvme_loop_ctrl *ctrl = to_loop_ctrl(set->driver_data);
 	struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(req);

drivers/scsi/scsi_lib.c

@@ -1950,7 +1950,7 @@ out_put_budget:
 }
 
 static int scsi_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
-				unsigned int hctx_idx, unsigned int numa_node)
+				unsigned int hctx_idx, int numa_node)
 {
 	struct Scsi_Host *shost = set->driver_data;
 	struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);

include/linux/blk-mq.h

@@ -428,7 +428,7 @@ struct blk_mq_hw_ctx {
 	struct blk_mq_tags	*sched_tags;
 
 	/** @numa_node: NUMA node the storage adapter has been connected to. */
-	unsigned int		numa_node;
+	int			numa_node;
 	/** @queue_num: Index of this hardware queue. */
 	unsigned int		queue_num;
 
@@ -653,7 +653,7 @@ struct blk_mq_ops {
 	 * flush request.
 	 */
 	int (*init_request)(struct blk_mq_tag_set *set, struct request *,
-			    unsigned int, unsigned int);
+			    unsigned int, int);
 	/**
 	 * @exit_request: Ditto for exit/teardown.
 	 */