From: Zijun Hu <quic_zijuhu(a)quicinc.com>
drivers_probe_store() regards bus_rescan_devices_helper()'s returned
value 0 as success when find driver for a single device user specify
that is wrong since the following 3 failed cases also return 0:
(1) the device is dead
(2) bus fails to match() the device with any its driver
(3) bus fails to probe() the device with any its driver
Fixed by only regarding successfully attaching the device to a driver
as success.
Fixes: b8c5cec23d5c ("Driver core: udev triggered device-<>driver binding")
Cc: stable(a)vger.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu(a)quicinc.com>
---
drivers/base/bus.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index abf090ace833..0a994e63785c 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -40,6 +40,20 @@ static struct kset *bus_kset;
struct driver_attribute driver_attr_##_name = \
__ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store)
+/* Bus rescans drivers for a single device */
+static int __must_check bus_rescan_single_device(struct device *dev)
+{
+ int ret;
+
+ if (dev->parent && dev->bus->need_parent_lock)
+ device_lock(dev->parent);
+ ret = device_attach(dev);
+ if (dev->parent && dev->bus->need_parent_lock)
+ device_unlock(dev->parent);
+
+ return ret;
+}
+
static int __must_check bus_rescan_devices_helper(struct device *dev,
void *data);
@@ -311,12 +325,19 @@ static ssize_t drivers_probe_store(const struct bus_type *bus,
{
struct device *dev;
int err = -EINVAL;
+ int res;
dev = bus_find_device_by_name(bus, NULL, buf);
if (!dev)
return -ENODEV;
- if (bus_rescan_devices_helper(dev, NULL) == 0)
+
+ res = bus_rescan_single_device(dev);
+ /* Propagate error code upwards as far as possible */
+ if (res < 0)
+ err = res;
+ else if (res == 1)
err = count;
+
put_device(dev);
return err;
}
---
base-commit: 888f67e621dda5c2804a696524e28d0ca4cf0a80
change-id: 20240826-fix_drivers_probe-88c6a2cc1899
Best regards,
--
Zijun Hu <quic_zijuhu(a)quicinc.com>
This changes the judgement of if needing to round up the width or not,
from using the `dp_flow` to the plane's type.
The `dp_flow` can be -22(-EINVAL) even the plane is a PRIMARY one.
See `client_reg[]` in `ipu-common.c`.
[ 0.605141] [drm:ipu_plane_init] channel 28, dp flow -22, possible_crtcs=0x0
Per the commit message in commit: 71f9fd5bcf09, using the plane type for
judging if rounding up is needed is correct.
Fixes: 71f9fd5bcf09 ("drm/imx: ipuv3-plane: Fix overlay plane width")
Cc: stable(a)vger.kernel.org
Signed-off-by: Paul Pu <hui.pu(a)gehealthcare.com>
---
drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
index 704c549750f9..cee83ac70ada 100644
--- a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
@@ -614,7 +614,7 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
break;
}
- if (ipu_plane->dp_flow == IPU_DP_FLOW_SYNC_BG)
+ if (ipu_plane->base.type == DRM_PLANE_TYPE_PRIMARY)
width = ipu_src_rect_width(new_state);
else
width = drm_rect_width(&new_state->src) >> 16;
base-commit: 431c1646e1f86b949fa3685efc50b660a364c2b6
--
2.39.2