From cb743930eb91e5b608c4491ce1b930dfeca43943 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Wed, 23 Mar 2011 05:43:51 -0300
Subject: [PATCH] [media] sh_mobile_csi2: fix module reloading
If the camera host driver (sh_mobile_ceu_camera.c) is unloaded and then
reloaded, probe will fail, because camera client .set_bus_param() and
.query_bus_param() methods have been set to NULL. Fix this by caching
the original pointers and restoring them on driver-unbind.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
drivers/media/video/sh_mobile_csi2.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/sh_mobile_csi2.c b/drivers/media/video/sh_mobile_csi2.c
index 9e7c1a7c46c2..98b87481fa94 100644
--- a/drivers/media/video/sh_mobile_csi2.c
+++ b/drivers/media/video/sh_mobile_csi2.c
@@ -38,6 +38,8 @@ struct sh_csi2 {
void __iomem *base;
struct platform_device *pdev;
struct sh_csi2_client_config *client;
+ unsigned long (*query_bus_param)(struct soc_camera_device *);
+ int (*set_bus_param)(struct soc_camera_device *, unsigned long);
};
static int sh_csi2_try_fmt(struct v4l2_subdev *sd,
@@ -216,6 +218,8 @@ static int sh_csi2_notify(struct notifier_block *nb,
priv->client = pdata->clients + i;
+ priv->set_bus_param = icd->ops->set_bus_param;
+ priv->query_bus_param = icd->ops->query_bus_param;
icd->ops->set_bus_param = sh_csi2_set_bus_param;
icd->ops->query_bus_param = sh_csi2_query_bus_param;
@@ -227,8 +231,10 @@ static int sh_csi2_notify(struct notifier_block *nb,
priv->client = NULL;
/* Driver is about to be unbound */
- icd->ops->set_bus_param = NULL;
- icd->ops->query_bus_param = NULL;
+ icd->ops->set_bus_param = priv->set_bus_param;
+ icd->ops->query_bus_param = priv->query_bus_param;
+ priv->set_bus_param = NULL;
+ priv->query_bus_param = NULL;
v4l2_device_unregister_subdev(&priv->subdev);
--
2.20.1