skd: Remove skd_device.in_flight
Since skd_device.in_flight is only used to display the number of
in-flight requests in debug messages, remove that member and
introduce skd_in_flight(). That last function relies on the block
layer to determine the number of in flight requests.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index a982de2..a20434c 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -238,7 +238,6 @@
enum skd_drvr_state state;
u32 drive_state;
- atomic_t in_flight;
u32 cur_max_queue_depth;
u32 queue_low_water_mark;
u32 dev_max_queue_depth;
@@ -391,6 +390,22 @@
* READ/WRITE REQUESTS
*****************************************************************************
*/
+static void skd_inc_in_flight(struct request *rq, void *data, bool reserved)
+{
+ int *count = data;
+
+ count++;
+}
+
+static int skd_in_flight(struct skd_device *skdev)
+{
+ int count = 0;
+
+ blk_mq_tagset_busy_iter(&skdev->tag_set, skd_inc_in_flight, &count);
+
+ return count;
+}
+
static void
skd_prep_rw_cdb(struct skd_scsi_request *scsi_req,
int data_dir, unsigned lba,
@@ -567,9 +582,8 @@
skmsg->length += sizeof(struct skd_scsi_request);
fmh->num_protocol_cmds_coalesced++;
- atomic_inc(&skdev->in_flight);
dev_dbg(&skdev->pdev->dev, "req=0x%x busy=%d\n", skreq->id,
- atomic_read(&skdev->in_flight));
+ skd_in_flight(skdev));
/*
* If the FIT msg buffer is full send it.
@@ -1218,7 +1232,7 @@
u64 qcmd;
dev_dbg(&skdev->pdev->dev, "dma address 0x%llx, busy=%d\n",
- skmsg->mb_dma_address, atomic_read(&skdev->in_flight));
+ skmsg->mb_dma_address, skd_in_flight(skdev));
dev_dbg(&skdev->pdev->dev, "msg_buf %p\n", skmsg->msg_buf);
qcmd = skmsg->mb_dma_address;
@@ -1452,13 +1466,6 @@
struct skd_request_context *skreq)
{
/*
- * Decrease the number of active requests.
- * Also decrements the count in the timeout slot.
- */
- SKD_ASSERT(atomic_read(&skdev->in_flight) > 0);
- atomic_dec(&skdev->in_flight);
-
- /*
* Reclaim the skd_request_context
*/
skreq->state = SKD_REQ_STATE_IDLE;
@@ -1498,7 +1505,7 @@
dev_dbg(&skdev->pdev->dev,
"cycle=%d ix=%d got cycle=%d cmdctxt=0x%x stat=%d busy=%d rbytes=0x%x proto=%d\n",
skdev->skcomp_cycle, skdev->skcomp_ix, cmp_cycle,
- cmp_cntxt, cmp_status, atomic_read(&skdev->in_flight),
+ cmp_cntxt, cmp_status, skd_in_flight(skdev),
cmp_bytes, skdev->proto_ver);
if (cmp_cycle != skdev->skcomp_cycle) {
@@ -1590,7 +1597,7 @@
}
if (skdev->state == SKD_DRVR_STATE_PAUSING &&
- atomic_read(&skdev->in_flight) == 0) {
+ skd_in_flight(skdev) == 0) {
skdev->state = SKD_DRVR_STATE_PAUSED;
wake_up_interruptible(&skdev->waitq);
}
@@ -1929,8 +1936,6 @@
static void skd_recover_requests(struct skd_device *skdev)
{
blk_mq_tagset_busy_iter(&skdev->tag_set, skd_recover_request, skdev);
-
- atomic_set(&skdev->in_flight, 0);
}
static void skd_isr_msg_from_dev(struct skd_device *skdev)
@@ -3560,7 +3565,7 @@
skd_drive_state_to_str(skdev->drive_state), skdev->drive_state,
skd_skdev_state_to_str(skdev->state), skdev->state);
dev_dbg(&skdev->pdev->dev, " busy=%d limit=%d dev=%d lowat=%d\n",
- atomic_read(&skdev->in_flight), skdev->cur_max_queue_depth,
+ skd_in_flight(skdev), skdev->cur_max_queue_depth,
skdev->dev_max_queue_depth, skdev->queue_low_water_mark);
dev_dbg(&skdev->pdev->dev, " cycle=%d cycle_ix=%d\n",
skdev->skcomp_cycle, skdev->skcomp_ix);