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From:   John Garry <john.garry@huawei.com>
To:     <axboe@kernel.dk>, <damien.lemoal@opensource.wdc.com>,
        <bvanassche@acm.org>, <hch@lst.de>, <jejb@linux.ibm.com>,
        <martin.petersen@oracle.com>, <hare@suse.de>, <satishkh@cisco.com>,
        <sebaddel@cisco.com>, <kartilak@cisco.com>
CC:     <linux-doc@vger.kernel.org>, <linux-rdma@vger.kernel.org>,
        <linux-mmc@vger.kernel.org>, <linux-nvme@lists.infradead.org>,
        <linux-s390@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
        <mpi3mr-linuxdrv.pdl@broadcom.com>, <linux-block@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <nbd@other.debian.org>,
        John Garry <john.garry@huawei.com>
Subject: [PATCH v2 3/6] blk-mq: Drop blk_mq_ops.timeout 'reserved' arg
Date:   Tue, 21 Jun 2022 19:15:40 +0800
Message-ID: <1655810143-67784-4-git-send-email-john.garry@huawei.com>
In-Reply-To: <1655810143-67784-1-git-send-email-john.garry@huawei.com>
References: <1655810143-67784-1-git-send-email-john.garry@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

With new API blk_mq_is_reserved_rq() we can tell if a request is from
the reserved pool, so stop passing 'reserved' arg. There is actually
only a single user of that arg for all the callback implementations, which
can use blk_mq_is_reserved_rq() instead.

This will also allow us to stop passing the same 'reserved' around the
blk-mq iter functions next.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
 block/blk-mq.c                    | 6 +++---
 block/bsg-lib.c                   | 2 +-
 drivers/block/mtip32xx/mtip32xx.c | 5 ++---
 drivers/block/nbd.c               | 3 +--
 drivers/block/null_blk/main.c     | 2 +-
 drivers/mmc/core/queue.c          | 3 +--
 drivers/nvme/host/apple.c         | 3 +--
 drivers/nvme/host/fc.c            | 3 +--
 drivers/nvme/host/pci.c           | 2 +-
 drivers/nvme/host/rdma.c          | 3 +--
 drivers/nvme/host/tcp.c           | 3 +--
 drivers/s390/block/dasd.c         | 2 +-
 drivers/s390/block/dasd_int.h     | 2 +-
 drivers/scsi/scsi_error.c         | 3 +--
 drivers/scsi/scsi_priv.h          | 3 +--
 include/linux/blk-mq.h            | 2 +-
 16 files changed, 19 insertions(+), 28 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index d38c97fe89f5..81bd39e36e49 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1426,13 +1426,13 @@ bool blk_mq_queue_inflight(struct request_queue *q)
 }
 EXPORT_SYMBOL_GPL(blk_mq_queue_inflight);
 
-static void blk_mq_rq_timed_out(struct request *req, bool reserved)
+static void blk_mq_rq_timed_out(struct request *req)
 {
 	req->rq_flags |= RQF_TIMED_OUT;
 	if (req->q->mq_ops->timeout) {
 		enum blk_eh_timer_return ret;
 
-		ret = req->q->mq_ops->timeout(req, reserved);
+		ret = req->q->mq_ops->timeout(req);
 		if (ret == BLK_EH_DONE)
 			return;
 		WARN_ON_ONCE(ret != BLK_EH_RESET_TIMER);
@@ -1481,7 +1481,7 @@ static bool blk_mq_check_expired(struct request *rq, void *priv, bool reserved)
 	 * from blk_mq_check_expired().
 	 */
 	if (blk_mq_req_expired(rq, next))
-		blk_mq_rq_timed_out(rq, reserved);
+		blk_mq_rq_timed_out(rq);
 	return true;
 }
 
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index acfe1357bf6c..9570c77b9fe3 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -331,7 +331,7 @@ void bsg_remove_queue(struct request_queue *q)
 }
 EXPORT_SYMBOL_GPL(bsg_remove_queue);
 
-static enum blk_eh_timer_return bsg_timeout(struct request *rq, bool reserved)
+static enum blk_eh_timer_return bsg_timeout(struct request *rq)
 {
 	struct bsg_set *bset =
 		container_of(rq->q->tag_set, struct bsg_set, tag_set);
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 27386a572ba4..d5767215840c 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3487,12 +3487,11 @@ static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
 	return 0;
 }
 
-static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req,
-								bool reserved)
+static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req)
 {
 	struct driver_data *dd = req->q->queuedata;
 
-	if (reserved) {
+	if (blk_mq_is_reserved_rq(req)) {
 		struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
 
 		cmd->status = BLK_STS_TIMEOUT;
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 07f3c139a3d7..166303716560 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -393,8 +393,7 @@ static u32 req_to_nbd_cmd_type(struct request *req)
 	}
 }
 
-static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
-						 bool reserved)
+static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req)
 {
 	struct nbd_cmd *cmd = blk_mq_rq_to_pdu(req);
 	struct nbd_device *nbd = cmd->nbd;
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 6b67088f4ea7..2d815d1eba25 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1578,7 +1578,7 @@ static int null_poll(struct blk_mq_hw_ctx *hctx, struct io_comp_batch *iob)
 	return nr;
 }
 
-static enum blk_eh_timer_return null_timeout_rq(struct request *rq, bool res)
+static enum blk_eh_timer_return null_timeout_rq(struct request *rq)
 {
 	struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
 	struct nullb_cmd *cmd = blk_mq_rq_to_pdu(rq);
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index fa5324ceeebe..17236340dbd2 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -116,8 +116,7 @@ static enum blk_eh_timer_return mmc_cqe_timed_out(struct request *req)
 	}
 }
 
-static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req,
-						 bool reserved)
+static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req)
 {
 	struct request_queue *q = req->q;
 	struct mmc_queue *mq = q->queuedata;
diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c
index d702d7d60235..495118ce958a 100644
--- a/drivers/nvme/host/apple.c
+++ b/drivers/nvme/host/apple.c
@@ -862,8 +862,7 @@ static void apple_nvme_disable(struct apple_nvme *anv, bool shutdown)
 	}
 }
 
-static enum blk_eh_timer_return apple_nvme_timeout(struct request *req,
-						   bool reserved)
+static enum blk_eh_timer_return apple_nvme_timeout(struct request *req)
 {
 	struct apple_nvme_iod *iod = blk_mq_rq_to_pdu(req);
 	struct apple_nvme_queue *q = iod->q;
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 3c778bb0c294..a166c0b1cc33 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2565,8 +2565,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
 	nvme_reset_ctrl(&ctrl->ctrl);
 }
 
-static enum blk_eh_timer_return
-nvme_fc_timeout(struct request *rq, bool reserved)
+static enum blk_eh_timer_return nvme_fc_timeout(struct request *rq)
 {
 	struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq);
 	struct nvme_fc_ctrl *ctrl = op->ctrl;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index c7012e85d035..83b1229a4e36 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1344,7 +1344,7 @@ static void nvme_warn_reset(struct nvme_dev *dev, u32 csts)
 		 "Try \"nvme_core.default_ps_max_latency_us=0 pcie_aspm=off\" and report a bug\n");
 }
 
-static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
+static enum blk_eh_timer_return nvme_timeout(struct request *req)
 {
 	struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
 	struct nvme_queue *nvmeq = iod->nvmeq;
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index f2a5e1ea508a..d2fb8651e49d 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -2013,8 +2013,7 @@ static void nvme_rdma_complete_timed_out(struct request *rq)
 	nvmf_complete_timed_out_request(rq);
 }
 
-static enum blk_eh_timer_return
-nvme_rdma_timeout(struct request *rq, bool reserved)
+static enum blk_eh_timer_return nvme_rdma_timeout(struct request *rq)
 {
 	struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
 	struct nvme_rdma_queue *queue = req->queue;
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index bb67538d241b..f21f7b0140f9 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2321,8 +2321,7 @@ static void nvme_tcp_complete_timed_out(struct request *rq)
 	nvmf_complete_timed_out_request(rq);
 }
 
-static enum blk_eh_timer_return
-nvme_tcp_timeout(struct request *rq, bool reserved)
+static enum blk_eh_timer_return nvme_tcp_timeout(struct request *rq)
 {
 	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);
 	struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl;
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index ba6d78789660..35d6f62ed515 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3145,7 +3145,7 @@ static blk_status_t do_dasd_request(struct blk_mq_hw_ctx *hctx,
  * BLK_EH_DONE if the request is handled or terminated
  *		      by the driver.
  */
-enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved)
+enum blk_eh_timer_return dasd_times_out(struct request *req)
 {
 	struct dasd_block *block = req->q->queuedata;
 	struct dasd_device *device;
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 83b918b84b4a..333a399f754e 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -795,7 +795,7 @@ void dasd_free_device(struct dasd_device *);
 struct dasd_block *dasd_alloc_block(void);
 void dasd_free_block(struct dasd_block *);
 
-enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
+enum blk_eh_timer_return dasd_times_out(struct request *req);
 
 void dasd_enable_device(struct dasd_device *);
 void dasd_set_target_state(struct dasd_device *, int);
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index a8b71b73a5a5..266ce414589c 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -318,7 +318,6 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
 /**
  * scsi_timeout - Timeout function for normal scsi commands.
  * @req:	request that is timing out.
- * @reserved:	whether the request is a reserved request.
  *
  * Notes:
  *     We do not need to lock this.  There is the potential for a race
@@ -326,7 +325,7 @@ void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
  *     normal completion function determines that the timer has already
  *     fired, then it mustn't do anything.
  */
-enum blk_eh_timer_return scsi_timeout(struct request *req, bool reserved)
+enum blk_eh_timer_return scsi_timeout(struct request *req)
 {
 	struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
 	enum blk_eh_timer_return rtn = BLK_EH_DONE;
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 695d0c83ffe0..6eeaa0a7f86d 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -72,8 +72,7 @@ extern void scsi_exit_devinfo(void);
 
 /* scsi_error.c */
 extern void scmd_eh_abort_handler(struct work_struct *work);
-extern enum blk_eh_timer_return scsi_timeout(struct request *req,
-					     bool reserved);
+extern enum blk_eh_timer_return scsi_timeout(struct request *req);
 extern int scsi_error_handler(void *host);
 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);
 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 6d81fe10e850..fbb08bdd4618 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -575,7 +575,7 @@ struct blk_mq_ops {
 	/**
 	 * @timeout: Called on request timeout.
 	 */
-	enum blk_eh_timer_return (*timeout)(struct request *, bool);
+	enum blk_eh_timer_return (*timeout)(struct request *);
 
 	/**
 	 * @poll: Called to poll for completion of a specific tag.
-- 
2.25.1