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media: ipu-bridge: Serialise calls to IPU bridge init

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The IPU bridge initialisation will be called from multiple locations in
the future. Serialise the access to devices' fwnodes in this context.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Sakari Ailus
2024-02-13 11:42:30 +02:00
committed by Hans Verkuil
parent e0251c2a1d
commit bef852dcd5
1 changed files with 4 additions and 0 deletions
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4
drivers/media/pci/intel/ipu-bridge.c
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@@ -766,6 +766,8 @@ static int ipu_bridge_check_fwnode_graph(struct fwnode_handle *fwnode)
return ipu_bridge_check_fwnode_graph(fwnode->secondary);
}
static DEFINE_MUTEX(ipu_bridge_mutex);
int ipu_bridge_init(struct device *dev,
ipu_parse_sensor_fwnode_t parse_sensor_fwnode)
{
@@ -774,6 +776,8 @@ int ipu_bridge_init(struct device *dev,
unsigned int i;
int ret;
guard(mutex)(&ipu_bridge_mutex);
if (!ipu_bridge_check_fwnode_graph(dev_fwnode(dev)))
return 0;