[PATCH REPOST 0/5] media: use irqsave() in USB's complete callback

[PATCH REPOST 0/5] media: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

This series is about using _irqsave() primitives in the completion
callback in order to get rid of local_irq_save() in
__usb_hcd_giveback_urb().

Sebastian

[PATCH REPOST 1/5] media: cx231xx: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/cx231xx/cx231xx-audio.c | 10 ++++++----
 drivers/media/usb/cx231xx/cx231xx-core.c  | 10 ++++++----
 drivers/media/usb/cx231xx/cx231xx-vbi.c   |  5 +++--
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/media/usb/cx231xx/cx231xx-audio.c b/drivers/media/usb/cx231xx/cx231xx-audio.c
index c4a84fb930b6..0025187c28e3 100644
--- a/drivers/media/usb/cx231xx/cx231xx-audio.c
+++ b/drivers/media/usb/cx231xx/cx231xx-audio.c
@@ -126,6 +126,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		for (i = 0; i < urb->number_of_packets; i++) {
+			unsigned long flags;
 			int length = urb->iso_frame_desc[i].actual_length /
 				     stride;
 			cp = (unsigned char *)urb->transfer_buffer +
@@ -148,7 +149,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -163,7 +164,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 						runtime->period_size;
 				period_elapsed = 1;
 			}
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
@@ -216,6 +217,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		if (1) {
+			unsigned long flags;
 			int length = urb->actual_length /
 				     stride;
 			cp = (unsigned char *)urb->transfer_buffer;
@@ -234,7 +236,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -249,7 +251,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 						runtime->period_size;
 				period_elapsed = 1;
 			}
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c
index 53d846dea3d2..493c2dca6244 100644
--- a/drivers/media/usb/cx231xx/cx231xx-core.c
+++ b/drivers/media/usb/cx231xx/cx231xx-core.c
@@ -799,6 +799,7 @@ static void cx231xx_isoc_irq_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -815,9 +816,9 @@ static void cx231xx_isoc_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->video_mode.slock);
+	spin_lock_irqsave(&dev->video_mode.slock, flags);
 	dev->video_mode.isoc_ctl.isoc_copy(dev, urb);
-	spin_unlock(&dev->video_mode.slock);
+	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {
@@ -844,6 +845,7 @@ static void cx231xx_bulk_irq_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
+	unsigned long flags;
 
 	switch (urb->status) {
 	case 0:		/* success */
@@ -862,9 +864,9 @@ static void cx231xx_bulk_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->video_mode.slock);
+	spin_lock_irqsave(&dev->video_mode.slock, flags);
 	dev->video_mode.bulk_ctl.bulk_copy(dev, urb);
-	spin_unlock(&dev->video_mode.slock);
+	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
 
 	/* Reset urb buffers */
 	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
diff --git a/drivers/media/usb/cx231xx/cx231xx-vbi.c b/drivers/media/usb/cx231xx/cx231xx-vbi.c
index b621cf1aa96b..920417baf893 100644
--- a/drivers/media/usb/cx231xx/cx231xx-vbi.c
+++ b/drivers/media/usb/cx231xx/cx231xx-vbi.c
@@ -305,6 +305,7 @@ static void cx231xx_irq_vbi_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode);
+	unsigned long flags;
 
 	switch (urb->status) {
 	case 0:		/* success */
@@ -321,9 +322,9 @@ static void cx231xx_irq_vbi_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->vbi_mode.slock);
+	spin_lock_irqsave(&dev->vbi_mode.slock, flags);
 	dev->vbi_mode.bulk_ctl.bulk_copy(dev, urb);
-	spin_unlock(&dev->vbi_mode.slock);
+	spin_unlock_irqrestore(&dev->vbi_mode.slock, flags);
 
 	/* Reset status */
 	urb->status = 0;
-- 
2.18.0

[REPOST,1/5] media: cx231xx: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/cx231xx/cx231xx-audio.c | 10 ++++++----
 drivers/media/usb/cx231xx/cx231xx-core.c  | 10 ++++++----
 drivers/media/usb/cx231xx/cx231xx-vbi.c   |  5 +++--
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/media/usb/cx231xx/cx231xx-audio.c b/drivers/media/usb/cx231xx/cx231xx-audio.c
index c4a84fb930b6..0025187c28e3 100644
--- a/drivers/media/usb/cx231xx/cx231xx-audio.c
+++ b/drivers/media/usb/cx231xx/cx231xx-audio.c
@@ -126,6 +126,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		for (i = 0; i < urb->number_of_packets; i++) {
+			unsigned long flags;
 			int length = urb->iso_frame_desc[i].actual_length /
 				     stride;
 			cp = (unsigned char *)urb->transfer_buffer +
@@ -148,7 +149,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -163,7 +164,7 @@ static void cx231xx_audio_isocirq(struct urb *urb)
 						runtime->period_size;
 				period_elapsed = 1;
 			}
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
@@ -216,6 +217,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		if (1) {
+			unsigned long flags;
 			int length = urb->actual_length /
 				     stride;
 			cp = (unsigned char *)urb->transfer_buffer;
@@ -234,7 +236,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -249,7 +251,7 @@ static void cx231xx_audio_bulkirq(struct urb *urb)
 						runtime->period_size;
 				period_elapsed = 1;
 			}
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c
index 53d846dea3d2..493c2dca6244 100644
--- a/drivers/media/usb/cx231xx/cx231xx-core.c
+++ b/drivers/media/usb/cx231xx/cx231xx-core.c
@@ -799,6 +799,7 @@ static void cx231xx_isoc_irq_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -815,9 +816,9 @@ static void cx231xx_isoc_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->video_mode.slock);
+	spin_lock_irqsave(&dev->video_mode.slock, flags);
 	dev->video_mode.isoc_ctl.isoc_copy(dev, urb);
-	spin_unlock(&dev->video_mode.slock);
+	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {
@@ -844,6 +845,7 @@ static void cx231xx_bulk_irq_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
+	unsigned long flags;
 
 	switch (urb->status) {
 	case 0:		/* success */
@@ -862,9 +864,9 @@ static void cx231xx_bulk_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->video_mode.slock);
+	spin_lock_irqsave(&dev->video_mode.slock, flags);
 	dev->video_mode.bulk_ctl.bulk_copy(dev, urb);
-	spin_unlock(&dev->video_mode.slock);
+	spin_unlock_irqrestore(&dev->video_mode.slock, flags);
 
 	/* Reset urb buffers */
 	urb->status = usb_submit_urb(urb, GFP_ATOMIC);
diff --git a/drivers/media/usb/cx231xx/cx231xx-vbi.c b/drivers/media/usb/cx231xx/cx231xx-vbi.c
index b621cf1aa96b..920417baf893 100644
--- a/drivers/media/usb/cx231xx/cx231xx-vbi.c
+++ b/drivers/media/usb/cx231xx/cx231xx-vbi.c
@@ -305,6 +305,7 @@ static void cx231xx_irq_vbi_callback(struct urb *urb)
 	struct cx231xx_video_mode *vmode =
 	    container_of(dma_q, struct cx231xx_video_mode, vidq);
 	struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode);
+	unsigned long flags;
 
 	switch (urb->status) {
 	case 0:		/* success */
@@ -321,9 +322,9 @@ static void cx231xx_irq_vbi_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->vbi_mode.slock);
+	spin_lock_irqsave(&dev->vbi_mode.slock, flags);
 	dev->vbi_mode.bulk_ctl.bulk_copy(dev, urb);
-	spin_unlock(&dev->vbi_mode.slock);
+	spin_unlock_irqrestore(&dev->vbi_mode.slock, flags);
 
 	/* Reset status */
 	urb->status = 0;

[PATCH REPOST 2/5] media: em28xx-audio: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/em28xx/em28xx-audio.c | 5 +++--
 drivers/media/usb/em28xx/em28xx-core.c  | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/em28xx/em28xx-audio.c b/drivers/media/usb/em28xx/em28xx-audio.c
index 8e799ae1df69..67481fc82445 100644
--- a/drivers/media/usb/em28xx/em28xx-audio.c
+++ b/drivers/media/usb/em28xx/em28xx-audio.c
@@ -116,6 +116,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		for (i = 0; i < urb->number_of_packets; i++) {
+			unsigned long flags;
 			int length =
 			    urb->iso_frame_desc[i].actual_length / stride;
 			cp = (unsigned char *)urb->transfer_buffer +
@@ -137,7 +138,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -153,7 +154,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 				period_elapsed = 1;
 			}
 
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index f70845e7d8c6..ec6e5152afd9 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -777,6 +777,7 @@ EXPORT_SYMBOL_GPL(em28xx_set_mode);
 static void em28xx_irq_callback(struct urb *urb)
 {
 	struct em28xx *dev = urb->context;
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -793,9 +794,9 @@ static void em28xx_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->slock);
+	spin_lock_irqsave(&dev->slock, flags);
 	dev->usb_ctl.urb_data_copy(dev, urb);
-	spin_unlock(&dev->slock);
+	spin_unlock_irqrestore(&dev->slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {
-- 
2.18.0

[REPOST,2/5] media: em28xx-audio: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/em28xx/em28xx-audio.c | 5 +++--
 drivers/media/usb/em28xx/em28xx-core.c  | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/em28xx/em28xx-audio.c b/drivers/media/usb/em28xx/em28xx-audio.c
index 8e799ae1df69..67481fc82445 100644
--- a/drivers/media/usb/em28xx/em28xx-audio.c
+++ b/drivers/media/usb/em28xx/em28xx-audio.c
@@ -116,6 +116,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 		stride = runtime->frame_bits >> 3;
 
 		for (i = 0; i < urb->number_of_packets; i++) {
+			unsigned long flags;
 			int length =
 			    urb->iso_frame_desc[i].actual_length / stride;
 			cp = (unsigned char *)urb->transfer_buffer +
@@ -137,7 +138,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 				       length * stride);
 			}
 
-			snd_pcm_stream_lock(substream);
+			snd_pcm_stream_lock_irqsave(substream, flags);
 
 			dev->adev.hwptr_done_capture += length;
 			if (dev->adev.hwptr_done_capture >=
@@ -153,7 +154,7 @@ static void em28xx_audio_isocirq(struct urb *urb)
 				period_elapsed = 1;
 			}
 
-			snd_pcm_stream_unlock(substream);
+			snd_pcm_stream_unlock_irqrestore(substream, flags);
 		}
 		if (period_elapsed)
 			snd_pcm_period_elapsed(substream);
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index f70845e7d8c6..ec6e5152afd9 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -777,6 +777,7 @@ EXPORT_SYMBOL_GPL(em28xx_set_mode);
 static void em28xx_irq_callback(struct urb *urb)
 {
 	struct em28xx *dev = urb->context;
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -793,9 +794,9 @@ static void em28xx_irq_callback(struct urb *urb)
 	}
 
 	/* Copy data from URB */
-	spin_lock(&dev->slock);
+	spin_lock_irqsave(&dev->slock, flags);
 	dev->usb_ctl.urb_data_copy(dev, urb);
-	spin_unlock(&dev->slock);
+	spin_unlock_irqrestore(&dev->slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {

[PATCH REPOST 3/5] media: go7007: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/go7007/go7007-driver.c |  9 +++++----
 drivers/media/usb/go7007/snd-go7007.c    | 11 ++++++-----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/media/usb/go7007/go7007-driver.c b/drivers/media/usb/go7007/go7007-driver.c
index 05b1126f263e..62aeebcdd7f7 100644
--- a/drivers/media/usb/go7007/go7007-driver.c
+++ b/drivers/media/usb/go7007/go7007-driver.c
@@ -448,13 +448,14 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 {
 	u32 *bytesused;
 	struct go7007_buffer *vb_tmp = NULL;
+	unsigned long flags;
 
 	if (vb == NULL) {
-		spin_lock(&go->spinlock);
+		spin_lock_irqsave(&go->spinlock, flags);
 		if (!list_empty(&go->vidq_active))
 			vb = go->active_buf =
 				list_first_entry(&go->vidq_active, struct go7007_buffer, list);
-		spin_unlock(&go->spinlock);
+		spin_unlock_irqrestore(&go->spinlock, flags);
 		go->next_seq++;
 		return vb;
 	}
@@ -468,7 +469,7 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 
 	vb->vb.vb2_buf.timestamp = ktime_get_ns();
 	vb_tmp = vb;
-	spin_lock(&go->spinlock);
+	spin_lock_irqsave(&go->spinlock, flags);
 	list_del(&vb->list);
 	if (list_empty(&go->vidq_active))
 		vb = NULL;
@@ -476,7 +477,7 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 		vb = list_first_entry(&go->vidq_active,
 				struct go7007_buffer, list);
 	go->active_buf = vb;
-	spin_unlock(&go->spinlock);
+	spin_unlock_irqrestore(&go->spinlock, flags);
 	vb2_buffer_done(&vb_tmp->vb.vb2_buf, VB2_BUF_STATE_DONE);
 	return vb;
 }
diff --git a/drivers/media/usb/go7007/snd-go7007.c b/drivers/media/usb/go7007/snd-go7007.c
index f84a2130f033..137fc253b122 100644
--- a/drivers/media/usb/go7007/snd-go7007.c
+++ b/drivers/media/usb/go7007/snd-go7007.c
@@ -75,13 +75,14 @@ static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length)
 	struct go7007_snd *gosnd = go->snd_context;
 	struct snd_pcm_runtime *runtime = gosnd->substream->runtime;
 	int frames = bytes_to_frames(runtime, length);
+	unsigned long flags;
 
-	spin_lock(&gosnd->lock);
+	spin_lock_irqsave(&gosnd->lock, flags);
 	gosnd->hw_ptr += frames;
 	if (gosnd->hw_ptr >= runtime->buffer_size)
 		gosnd->hw_ptr -= runtime->buffer_size;
 	gosnd->avail += frames;
-	spin_unlock(&gosnd->lock);
+	spin_unlock_irqrestore(&gosnd->lock, flags);
 	if (gosnd->w_idx + length > runtime->dma_bytes) {
 		int cpy = runtime->dma_bytes - gosnd->w_idx;
 
@@ -92,13 +93,13 @@ static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length)
 	}
 	memcpy(runtime->dma_area + gosnd->w_idx, buf, length);
 	gosnd->w_idx += length;
-	spin_lock(&gosnd->lock);
+	spin_lock_irqsave(&gosnd->lock, flags);
 	if (gosnd->avail < runtime->period_size) {
-		spin_unlock(&gosnd->lock);
+		spin_unlock_irqrestore(&gosnd->lock, flags);
 		return;
 	}
 	gosnd->avail -= runtime->period_size;
-	spin_unlock(&gosnd->lock);
+	spin_unlock_irqrestore(&gosnd->lock, flags);
 	if (gosnd->capturing)
 		snd_pcm_period_elapsed(gosnd->substream);
 }
-- 
2.18.0

[REPOST,3/5] media: go7007: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/go7007/go7007-driver.c |  9 +++++----
 drivers/media/usb/go7007/snd-go7007.c    | 11 ++++++-----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/media/usb/go7007/go7007-driver.c b/drivers/media/usb/go7007/go7007-driver.c
index 05b1126f263e..62aeebcdd7f7 100644
--- a/drivers/media/usb/go7007/go7007-driver.c
+++ b/drivers/media/usb/go7007/go7007-driver.c
@@ -448,13 +448,14 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 {
 	u32 *bytesused;
 	struct go7007_buffer *vb_tmp = NULL;
+	unsigned long flags;
 
 	if (vb == NULL) {
-		spin_lock(&go->spinlock);
+		spin_lock_irqsave(&go->spinlock, flags);
 		if (!list_empty(&go->vidq_active))
 			vb = go->active_buf =
 				list_first_entry(&go->vidq_active, struct go7007_buffer, list);
-		spin_unlock(&go->spinlock);
+		spin_unlock_irqrestore(&go->spinlock, flags);
 		go->next_seq++;
 		return vb;
 	}
@@ -468,7 +469,7 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 
 	vb->vb.vb2_buf.timestamp = ktime_get_ns();
 	vb_tmp = vb;
-	spin_lock(&go->spinlock);
+	spin_lock_irqsave(&go->spinlock, flags);
 	list_del(&vb->list);
 	if (list_empty(&go->vidq_active))
 		vb = NULL;
@@ -476,7 +477,7 @@ static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buf
 		vb = list_first_entry(&go->vidq_active,
 				struct go7007_buffer, list);
 	go->active_buf = vb;
-	spin_unlock(&go->spinlock);
+	spin_unlock_irqrestore(&go->spinlock, flags);
 	vb2_buffer_done(&vb_tmp->vb.vb2_buf, VB2_BUF_STATE_DONE);
 	return vb;
 }
diff --git a/drivers/media/usb/go7007/snd-go7007.c b/drivers/media/usb/go7007/snd-go7007.c
index f84a2130f033..137fc253b122 100644
--- a/drivers/media/usb/go7007/snd-go7007.c
+++ b/drivers/media/usb/go7007/snd-go7007.c
@@ -75,13 +75,14 @@ static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length)
 	struct go7007_snd *gosnd = go->snd_context;
 	struct snd_pcm_runtime *runtime = gosnd->substream->runtime;
 	int frames = bytes_to_frames(runtime, length);
+	unsigned long flags;
 
-	spin_lock(&gosnd->lock);
+	spin_lock_irqsave(&gosnd->lock, flags);
 	gosnd->hw_ptr += frames;
 	if (gosnd->hw_ptr >= runtime->buffer_size)
 		gosnd->hw_ptr -= runtime->buffer_size;
 	gosnd->avail += frames;
-	spin_unlock(&gosnd->lock);
+	spin_unlock_irqrestore(&gosnd->lock, flags);
 	if (gosnd->w_idx + length > runtime->dma_bytes) {
 		int cpy = runtime->dma_bytes - gosnd->w_idx;
 
@@ -92,13 +93,13 @@ static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length)
 	}
 	memcpy(runtime->dma_area + gosnd->w_idx, buf, length);
 	gosnd->w_idx += length;
-	spin_lock(&gosnd->lock);
+	spin_lock_irqsave(&gosnd->lock, flags);
 	if (gosnd->avail < runtime->period_size) {
-		spin_unlock(&gosnd->lock);
+		spin_unlock_irqrestore(&gosnd->lock, flags);
 		return;
 	}
 	gosnd->avail -= runtime->period_size;
-	spin_unlock(&gosnd->lock);
+	spin_unlock_irqrestore(&gosnd->lock, flags);
 	if (gosnd->capturing)
 		snd_pcm_period_elapsed(gosnd->substream);
 }

[PATCH REPOST 4/5] media: tm6000: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/tm6000/tm6000-video.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index 96055de6e8ce..7d268f2404e1 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -419,6 +419,7 @@ static void tm6000_irq_callback(struct urb *urb)
 {
 	struct tm6000_dmaqueue  *dma_q = urb->context;
 	struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq);
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -436,9 +437,9 @@ static void tm6000_irq_callback(struct urb *urb)
 		break;
 	}
 
-	spin_lock(&dev->slock);
+	spin_lock_irqsave(&dev->slock, flags);
 	tm6000_isoc_copy(urb);
-	spin_unlock(&dev->slock);
+	spin_unlock_irqrestore(&dev->slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {
-- 
2.18.0

[REPOST,4/5] media: tm6000: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/tm6000/tm6000-video.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index 96055de6e8ce..7d268f2404e1 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -419,6 +419,7 @@ static void tm6000_irq_callback(struct urb *urb)
 {
 	struct tm6000_dmaqueue  *dma_q = urb->context;
 	struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq);
+	unsigned long flags;
 	int i;
 
 	switch (urb->status) {
@@ -436,9 +437,9 @@ static void tm6000_irq_callback(struct urb *urb)
 		break;
 	}
 
-	spin_lock(&dev->slock);
+	spin_lock_irqsave(&dev->slock, flags);
 	tm6000_isoc_copy(urb);
-	spin_unlock(&dev->slock);
+	spin_unlock_irqrestore(&dev->slock, flags);
 
 	/* Reset urb buffers */
 	for (i = 0; i < urb->number_of_packets; i++) {

[PATCH REPOST 5/5] media: usbtv: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/usbtv/usbtv-audio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/usbtv/usbtv-audio.c b/drivers/media/usb/usbtv/usbtv-audio.c
index 2c2ca77fa01f..4ce38246ed64 100644
--- a/drivers/media/usb/usbtv/usbtv-audio.c
+++ b/drivers/media/usb/usbtv/usbtv-audio.c
@@ -126,6 +126,7 @@ static void usbtv_audio_urb_received(struct urb *urb)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	size_t i, frame_bytes, chunk_length, buffer_pos, period_pos;
 	int period_elapsed;
+	unsigned long flags;
 	void *urb_current;
 
 	switch (urb->status) {
@@ -179,12 +180,12 @@ static void usbtv_audio_urb_received(struct urb *urb)
 		}
 	}
 
-	snd_pcm_stream_lock(substream);
+	snd_pcm_stream_lock_irqsave(substream, flags);
 
 	chip->snd_buffer_pos = buffer_pos;
 	chip->snd_period_pos = period_pos;
 
-	snd_pcm_stream_unlock(substream);
+	snd_pcm_stream_unlock_irqrestore(substream, flags);
 
 	if (period_elapsed)
 		snd_pcm_period_elapsed(substream);
-- 
2.18.0

[REPOST,5/5] media: usbtv: use irqsave() in USB's complete callback

[Sebastian Andrzej Siewior]

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 drivers/media/usb/usbtv/usbtv-audio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/usbtv/usbtv-audio.c b/drivers/media/usb/usbtv/usbtv-audio.c
index 2c2ca77fa01f..4ce38246ed64 100644
--- a/drivers/media/usb/usbtv/usbtv-audio.c
+++ b/drivers/media/usb/usbtv/usbtv-audio.c
@@ -126,6 +126,7 @@ static void usbtv_audio_urb_received(struct urb *urb)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	size_t i, frame_bytes, chunk_length, buffer_pos, period_pos;
 	int period_elapsed;
+	unsigned long flags;
 	void *urb_current;
 
 	switch (urb->status) {
@@ -179,12 +180,12 @@ static void usbtv_audio_urb_received(struct urb *urb)
 		}
 	}
 
-	snd_pcm_stream_lock(substream);
+	snd_pcm_stream_lock_irqsave(substream, flags);
 
 	chip->snd_buffer_pos = buffer_pos;
 	chip->snd_period_pos = period_pos;
 
-	snd_pcm_stream_unlock(substream);
+	snd_pcm_stream_unlock_irqrestore(substream, flags);
 
 	if (period_elapsed)
 		snd_pcm_period_elapsed(substream);