Merge tag 'staging-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big Staging and IIO driver patches for 4.16-rc1.

  There is the normal amount of new IIO drivers added, like all
  releases.

  The networking IPX and the ncpfs filesystem are moved into the staging
  tree, as they are on their way out of the kernel due to lack of use
  anymore.

  The visorbus subsystem finall has started moving out of the staging
  tree to the "real" part of the kernel, and the most and fsl-mc
  codebases are almost ready to move out, that will probably happen for
  4.17-rc1 if all goes well.

  Other than that, there is a bunch of license header cleanups in the
  tree, along with the normal amount of coding style churn that we all
  know and love for this codebase. I also got frustrated at the
  Meltdown/Spectre mess and took it out on the dgnc tty driver, deleting
  huge chunks of it that were never even being used.

  Full details of everything is in the shortlog.

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

* tag 'staging-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (627 commits)
  staging: rtlwifi: remove redundant initialization of 'cfg_cmd'
  staging: rtl8723bs: remove a couple of redundant initializations
  staging: comedi: reformat lines to 80 chars or less
  staging: lustre: separate a connection destroy from free struct kib_conn
  Staging: rtl8723bs: Use !x instead of NULL comparison
  Staging: rtl8723bs: Remove dead code
  Staging: rtl8723bs: Change names to conform to the kernel code
  staging: ccree: Fix missing blank line after declaration
  staging: rtl8188eu: remove redundant initialization of 'pwrcfgcmd'
  staging: rtlwifi: remove unused RTLHALMAC_ST and RTLPHYDM_ST
  staging: fbtft: remove unused FB_TFT_SSD1325 kconfig
  staging: comedi: dt2811: remove redundant initialization of 'ns'
  staging: wilc1000: fix alignments to match open parenthesis
  staging: wilc1000: removed unnecessary defined enums typedef
  staging: wilc1000: remove unnecessary use of parentheses
  staging: rtl8192u: remove redundant initialization of 'timeout'
  staging: sm750fb: fix CamelCase for dispSet var
  staging: lustre: lnet/selftest: fix compile error on UP build
  staging: rtl8723bs: hal_com_phycfg: Remove unneeded semicolons
  staging: rts5208: Fix "seg_no" calculation in reset_ms_card()
  ...

3 files changed, 20 insertions, 20 deletions

diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index bb1d6da..26994b4 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -207,13 +207,9 @@ static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id)
 		goto unlock;
 	}
 
-	if (priv->fim) {
-		struct timespec cur_ts;
-
-		ktime_get_ts(&cur_ts);
+	if (priv->fim)
 		/* call frame interval monitor */
-		imx_media_fim_eof_monitor(priv->fim, &cur_ts);
-	}
+		imx_media_fim_eof_monitor(priv->fim, ktime_get());
 
 	csi_vb2_buf_done(priv);
 
diff --git a/drivers/staging/media/imx/imx-media-fim.c b/drivers/staging/media/imx/imx-media-fim.c
index 47275ef..6df1891 100644
--- a/drivers/staging/media/imx/imx-media-fim.c
+++ b/drivers/staging/media/imx/imx-media-fim.c
@@ -66,7 +66,7 @@ struct imx_media_fim {
 	int               icap_flags;
 
 	int               counter;
-	struct timespec   last_ts;
+	ktime_t		  last_ts;
 	unsigned long     sum;       /* usec */
 	unsigned long     nominal;   /* usec */
 
@@ -147,22 +147,26 @@ static void send_fim_event(struct imx_media_fim *fim, unsigned long error)
  * (presumably random) interrupt latency.
  */
 static void frame_interval_monitor(struct imx_media_fim *fim,
-				   struct timespec *ts)
+				   ktime_t timestamp)
 {
-	unsigned long interval, error, error_avg;
+	long long interval, error;
+	unsigned long error_avg;
 	bool send_event = false;
-	struct timespec diff;
 
 	if (!fim->enabled || ++fim->counter <= 0)
 		goto out_update_ts;
 
-	diff = timespec_sub(*ts, fim->last_ts);
-	interval = diff.tv_sec * 1000 * 1000 + diff.tv_nsec / 1000;
-	error = abs(interval - fim->nominal);
+	/* max error is less than l00µs, so use 32-bit division or fail */
+	interval = ktime_to_ns(ktime_sub(timestamp, fim->last_ts));
+	error = abs(interval - NSEC_PER_USEC * (u64)fim->nominal);
+	if (error > U32_MAX)
+		error = U32_MAX;
+	else
+		error = abs((u32)error / NSEC_PER_USEC);
 
 	if (fim->tolerance_max && error >= fim->tolerance_max) {
 		dev_dbg(fim->sd->dev,
-			"FIM: %lu ignored, out of tolerance bounds\n",
+			"FIM: %llu ignored, out of tolerance bounds\n",
 			error);
 		fim->counter--;
 		goto out_update_ts;
@@ -184,7 +188,7 @@ static void frame_interval_monitor(struct imx_media_fim *fim,
 	}
 
 out_update_ts:
-	fim->last_ts = *ts;
+	fim->last_ts = timestamp;
 	if (send_event)
 		send_fim_event(fim, error_avg);
 }
@@ -195,14 +199,14 @@ out_update_ts:
  * to interrupt latency.
  */
 static void fim_input_capture_handler(int channel, void *dev_id,
-				      struct timespec *ts)
+				      ktime_t timestamp)
 {
 	struct imx_media_fim *fim = dev_id;
 	unsigned long flags;
 
 	spin_lock_irqsave(&fim->lock, flags);
 
-	frame_interval_monitor(fim, ts);
+	frame_interval_monitor(fim, timestamp);
 
 	if (!completion_done(&fim->icap_first_event))
 		complete(&fim->icap_first_event);
@@ -405,14 +409,14 @@ err_free:
  * the frame_interval_monitor() is called by the input capture event
  * callback handler in that case.
  */
-void imx_media_fim_eof_monitor(struct imx_media_fim *fim, struct timespec *ts)
+void imx_media_fim_eof_monitor(struct imx_media_fim *fim, ktime_t timestamp)
 {
 	unsigned long flags;
 
 	spin_lock_irqsave(&fim->lock, flags);
 
 	if (!icap_enabled(fim))
-		frame_interval_monitor(fim, ts);
+		frame_interval_monitor(fim, timestamp);
 
 	spin_unlock_irqrestore(&fim->lock, flags);
 }
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index d409170..ac3ab11 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -280,7 +280,7 @@ int imx_media_pipeline_set_stream(struct imx_media_dev *imxmd,
 
 /* imx-media-fim.c */
 struct imx_media_fim;
-void imx_media_fim_eof_monitor(struct imx_media_fim *fim, struct timespec *ts);
+void imx_media_fim_eof_monitor(struct imx_media_fim *fim, ktime_t timestamp);
 int imx_media_fim_set_stream(struct imx_media_fim *fim,
 			     const struct v4l2_fract *frame_interval,
 			     bool on);