diff mbox series

[v4,17/26] media: omap3isp: Release the isp device struct by media device callback

Message ID 20240610100530.1107771-18-sakari.ailus@linux.intel.com (mailing list archive)
State New
Headers
Series Media device lifetime management |

Commit Message

Sakari Ailus June 10, 2024, 10:05 a.m. UTC 
  Use the media device release callback to release the isp device's data
structure. This approach has the benefit of not releasing memory which may
still be accessed through open file handles whilst the isp driver is being
unbound.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/media/platform/ti/omap3isp/isp.c | 25 ++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/ti/omap3isp/isp.c b/drivers/media/platform/ti/omap3isp/isp.c
index 1cda23244c7b..b63b750452b1 100644
--- a/drivers/media/platform/ti/omap3isp/isp.c
+++ b/drivers/media/platform/ti/omap3isp/isp.c
@@ -649,8 +649,11 @@  static irqreturn_t isp_isr(int irq, void *_isp)
 	return IRQ_HANDLED;
 }
 
+static void isp_release(struct media_device *mdev);
+
 static const struct media_device_ops isp_media_ops = {
 	.link_notify = v4l2_pipeline_link_notify,
+	.release = isp_release,
 };
 
 /* -----------------------------------------------------------------------------
@@ -1607,7 +1610,6 @@  static void isp_unregister_entities(struct isp_device *isp)
 	omap3isp_stat_unregister_entities(&isp->isp_hist);
 
 	v4l2_device_unregister(&isp->v4l2_dev);
-	media_device_cleanup(&isp->media_dev);
 }
 
 static int isp_link_entity(
@@ -1955,6 +1957,19 @@  static void isp_detach_iommu(struct isp_device *isp)
 #endif
 }
 
+static void isp_release(struct media_device *mdev)
+{
+	struct isp_device *isp =
+		container_of(mdev, struct isp_device, media_dev);
+
+	isp_cleanup_modules(isp);
+
+	media_entity_enum_cleanup(&isp->crashed);
+	v4l2_async_nf_cleanup(&isp->notifier);
+
+	kfree(isp);
+}
+
 static int isp_attach_iommu(struct isp_device *isp)
 {
 #ifdef CONFIG_ARM_DMA_USE_IOMMU
@@ -2002,18 +2017,16 @@  static void isp_remove(struct platform_device *pdev)
 	struct isp_device *isp = platform_get_drvdata(pdev);
 
 	v4l2_async_nf_unregister(&isp->notifier);
-	v4l2_async_nf_cleanup(&isp->notifier);
 	isp_unregister_entities(isp);
-	isp_cleanup_modules(isp);
+
 	isp_xclk_cleanup(isp);
 
 	__omap3isp_get(isp, false);
 	isp_detach_iommu(isp);
 	__omap3isp_put(isp, false);
 
-	media_entity_enum_cleanup(&isp->crashed);
-
-	kfree(isp);
+	/* May release isp immediately */
+	media_device_put(&isp->media_dev);
 }
 
 enum isp_of_phy {