Merge tag 'media/v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - regression fix for the rtl28xxu I2C logic

 - build fix for the atmel driver

 - videobuf2-core: dequeue if start_streaming fails

* tag 'media/v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: atmel: fix build when ISC=m and XISC=y
  media: videobuf2-core: dequeue if start_streaming fails
  media: rtl28xxu: fix zero-length control request
  media: Revert "media: rtl28xxu: fix zero-length control request"

drivers/media/common/videobuf2/videobuf2-core.c

@@ -1573,6 +1573,7 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
 		  struct media_request *req)
 {
 	struct vb2_buffer *vb;
+	enum vb2_buffer_state orig_state;
 	int ret;
 
 	if (q->error) {
@@ -1673,6 +1674,7 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
 	 * Add to the queued buffers list, a buffer will stay on it until
 	 * dequeued in dqbuf.
 	 */
+	orig_state = vb->state;
 	list_add_tail(&vb->queued_entry, &q->queued_list);
 	q->queued_count++;
 	q->waiting_for_buffers = false;
@@ -1703,9 +1705,18 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
 	if (q->streaming && !q->start_streaming_called &&
 	    q->queued_count >= q->min_buffers_needed) {
 		ret = vb2_start_streaming(q);
-		if (ret)
+		if (ret) {
+			/*
+			 * Since vb2_core_qbuf will return with an error,
+			 * we should return it to state DEQUEUED since
+			 * the error indicates that the buffer wasn't queued.
+			 */
+			list_del(&vb->queued_entry);
+			q->queued_count--;
+			vb->state = orig_state;
 			return ret;
 		}
+	}
 
 	dprintk(q, 2, "qbuf of buffer %d succeeded\n", vb->index);
 	return 0;

drivers/media/platform/atmel/Kconfig

@@ -8,6 +8,7 @@ config VIDEO_ATMEL_ISC
 	select VIDEOBUF2_DMA_CONTIG
 	select REGMAP_MMIO
 	select V4L2_FWNODE
+	select VIDEO_ATMEL_ISC_BASE
 	help
 	   This module makes the ATMEL Image Sensor Controller available
 	   as a v4l2 device.
@@ -19,10 +20,17 @@ config VIDEO_ATMEL_XISC
 	select VIDEOBUF2_DMA_CONTIG
 	select REGMAP_MMIO
 	select V4L2_FWNODE
+	select VIDEO_ATMEL_ISC_BASE
 	help
 	   This module makes the ATMEL eXtended Image Sensor Controller
 	   available as a v4l2 device.
 
+config VIDEO_ATMEL_ISC_BASE
+	tristate
+	default n
+	help
+	  ATMEL ISC and XISC common code base.
+
 config VIDEO_ATMEL_ISI
 	tristate "ATMEL Image Sensor Interface (ISI) support"
 	depends on VIDEO_V4L2 && OF

drivers/media/platform/atmel/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-atmel-isc-objs = atmel-sama5d2-isc.o atmel-isc-base.o
-atmel-xisc-objs = atmel-sama7g5-isc.o atmel-isc-base.o
+atmel-isc-objs = atmel-sama5d2-isc.o
+atmel-xisc-objs = atmel-sama7g5-isc.o
 
 obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
+obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-base.o
 obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
 obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o

drivers/media/platform/atmel/atmel-isc-base.c

@@ -378,6 +378,7 @@ int isc_clk_init(struct isc_device *isc)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(isc_clk_init);
 
 void isc_clk_cleanup(struct isc_device *isc)
 {
@@ -392,6 +393,7 @@ void isc_clk_cleanup(struct isc_device *isc)
 			clk_unregister(isc_clk->clk);
 	}
 }
+EXPORT_SYMBOL_GPL(isc_clk_cleanup);
 
 static int isc_queue_setup(struct vb2_queue *vq,
 			    unsigned int *nbuffers, unsigned int *nplanes,
@@ -1578,6 +1580,7 @@ irqreturn_t isc_interrupt(int irq, void *dev_id)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(isc_interrupt);
 
 static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
 {
@@ -2212,6 +2215,7 @@ const struct v4l2_async_notifier_operations isc_async_ops = {
 	.unbind = isc_async_unbind,
 	.complete = isc_async_complete,
 };
+EXPORT_SYMBOL_GPL(isc_async_ops);
 
 void isc_subdev_cleanup(struct isc_device *isc)
 {
@@ -2224,6 +2228,7 @@ void isc_subdev_cleanup(struct isc_device *isc)
 
 	INIT_LIST_HEAD(&isc->subdev_entities);
 }
+EXPORT_SYMBOL_GPL(isc_subdev_cleanup);
 
 int isc_pipeline_init(struct isc_device *isc)
 {
@@ -2264,6 +2269,7 @@ int isc_pipeline_init(struct isc_device *isc)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(isc_pipeline_init);
 
 /* regmap configuration */
 #define ATMEL_ISC_REG_MAX    0xd5c
@@ -2273,4 +2279,9 @@ const struct regmap_config isc_regmap_config = {
 	.val_bits       = 32,
 	.max_register	= ATMEL_ISC_REG_MAX,
 };
+EXPORT_SYMBOL_GPL(isc_regmap_config);
 
+MODULE_AUTHOR("Songjun Wu");
+MODULE_AUTHOR("Eugen Hristev");
+MODULE_DESCRIPTION("Atmel ISC common code base");
+MODULE_LICENSE("GPL v2");

drivers/media/usb/dvb-usb-v2/rtl28xxu.c

@@ -37,7 +37,16 @@ static int rtl28xxu_ctrl_msg(struct dvb_usb_device *d, struct rtl28xxu_req *req)
 	} else {
 		/* read */
 		requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
+
+		/*
+		 * Zero-length transfers must use usb_sndctrlpipe() and
+		 * rtl28xxu_identify_state() uses a zero-length i2c read
+		 * command to determine the chip type.
+		 */
+		if (req->size)
 			pipe = usb_rcvctrlpipe(d->udev, 0);
+		else
+			pipe = usb_sndctrlpipe(d->udev, 0);
 	}
 
 	ret = usb_control_msg(d->udev, pipe, 0, requesttype, req->value,
@@ -612,9 +621,8 @@ static int rtl28xxu_read_config(struct dvb_usb_device *d)
 static int rtl28xxu_identify_state(struct dvb_usb_device *d, const char **name)
 {
 	struct rtl28xxu_dev *dev = d_to_priv(d);
-	u8 buf[1];
 	int ret;
-	struct rtl28xxu_req req_demod_i2c = {0x0020, CMD_I2C_DA_RD, 1, buf};
+	struct rtl28xxu_req req_demod_i2c = {0x0020, CMD_I2C_DA_RD, 0, NULL};
 
 	dev_dbg(&d->intf->dev, "\n");