Merge tag 'char-misc-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big char/misc driver pull request for 5.4-rc1.

  As has been happening in previous releases, more and more individual
  driver subsystem trees are ending up in here. Now if that is good or
  bad I can't tell, but hopefully it makes your life easier as it's more
  of an aggregation of trees together to one merge point for you.

  Anyway, lots of stuff in here:
     - habanalabs driver updates
     - thunderbolt driver updates
     - misc driver updates
     - coresight and intel_th hwtracing driver updates
     - fpga driver updates
     - extcon driver updates
     - some dma driver updates
     - char driver updates
     - android binder driver updates
     - nvmem driver updates
     - phy driver updates
     - parport driver fixes
     - pcmcia driver fix
     - uio driver updates
     - w1 driver updates
     - configfs fixes
     - other assorted driver updates

  All of these have been in linux-next for a long time with no reported
  issues"

* tag 'char-misc-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (200 commits)
  misc: mic: Use PTR_ERR_OR_ZERO rather than its implementation
  habanalabs: correctly cast variable to __le32
  habanalabs: show correct id in error print
  habanalabs: stop using the acronym KMD
  habanalabs: display card name as sensors header
  habanalabs: add uapi to retrieve aggregate H/W events
  habanalabs: add uapi to retrieve device utilization
  habanalabs: Make the Coresight timestamp perpetual
  habanalabs: explicitly set the queue-id enumerated numbers
  habanalabs: print to kernel log when reset is finished
  habanalabs: replace __le32_to_cpu with le32_to_cpu
  habanalabs: replace __cpu_to_le32/64 with cpu_to_le32/64
  habanalabs: Handle HW_IP_INFO if device disabled or in reset
  habanalabs: Expose devices after initialization is done
  habanalabs: improve security in Debug IOCTL
  habanalabs: use default structure for user input in Debug IOCTL
  habanalabs: Add descriptive name to PSOC app status register
  habanalabs: Add descriptive names to PSOC scratch-pad registers
  habanalabs: create two char devices per ASIC
  habanalabs: change device_setup_cdev() to be more generic
  ...

1 files changed, 21 insertions, 6 deletions

diff --git a/drivers/misc/habanalabs/command_submission.c b/drivers/misc/habanalabs/command_submission.c
index f00d1c32f6d6..a9ac045dcfde 100644
--- a/drivers/misc/habanalabs/command_submission.c
+++ b/drivers/misc/habanalabs/command_submission.c
@@ -178,11 +178,23 @@ static void cs_do_release(struct kref *ref)
 
 	/* We also need to update CI for internal queues */
 	if (cs->submitted) {
-		int cs_cnt = atomic_dec_return(&hdev->cs_active_cnt);
+		hdev->asic_funcs->hw_queues_lock(hdev);
 
-		WARN_ONCE((cs_cnt < 0),
-			"hl%d: error in CS active cnt %d\n",
-			hdev->id, cs_cnt);
+		hdev->cs_active_cnt--;
+		if (!hdev->cs_active_cnt) {
+			struct hl_device_idle_busy_ts *ts;
+
+			ts = &hdev->idle_busy_ts_arr[hdev->idle_busy_ts_idx++];
+			ts->busy_to_idle_ts = ktime_get();
+
+			if (hdev->idle_busy_ts_idx == HL_IDLE_BUSY_TS_ARR_SIZE)
+				hdev->idle_busy_ts_idx = 0;
+		} else if (hdev->cs_active_cnt < 0) {
+			dev_crit(hdev->dev, "CS active cnt %d is negative\n",
+				hdev->cs_active_cnt);
+		}
+
+		hdev->asic_funcs->hw_queues_unlock(hdev);
 
 		hl_int_hw_queue_update_ci(cs);
 
@@ -305,6 +317,8 @@ static int allocate_cs(struct hl_device *hdev, struct hl_ctx *ctx,
 	other = ctx->cs_pending[fence->cs_seq & (HL_MAX_PENDING_CS - 1)];
 	if ((other) && (!dma_fence_is_signaled(other))) {
 		spin_unlock(&ctx->cs_lock);
+		dev_dbg(hdev->dev,
+			"Rejecting CS because of too many in-flights CS\n");
 		rc = -EAGAIN;
 		goto free_fence;
 	}
@@ -395,8 +409,9 @@ static struct hl_cb *validate_queue_index(struct hl_device *hdev,
 		return NULL;
 	}
 
-	if (hw_queue_prop->kmd_only) {
-		dev_err(hdev->dev, "Queue index %d is restricted for KMD\n",
+	if (hw_queue_prop->driver_only) {
+		dev_err(hdev->dev,
+			"Queue index %d is restricted for the kernel driver\n",
 			chunk->queue_index);
 		return NULL;
 	} else if (hw_queue_prop->type == QUEUE_TYPE_INT) {