6.4-stable review patch. If anyone has any objections, please let me know.
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From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 11e0a7c8e04ee5f406f2baa27761746cbedcfa11 ]
Commit 567f97bd381f ("media: ipu3-cio2: support multiple sensors and VCMs with same HID") introduced an on stack vcm_name and then uses this for the name field of the software_node struct used for the vcm.
But the software_node struct is much longer lived then the current stack-frame, so this is no good.
Instead extend the ipu_node_names struct with an extra field to store the vcm software_node name and use that.
Note this also changes the length of the allocated buffer from ACPI_ID_LEN + 4 to 16. the name is filled with "<ipu_vcm_types[x]>-%u" where ipu_vcm_types[x] is not an ACPI_ID. The maximum length of the strings in the ipu_vcm_types[] array is 11 + 5 bytes for "-255\0" means 16 bytes are needed in the worst case scenario.
Fixes: 567f97bd381f ("media: ipu3-cio2: support multiple sensors and VCMs with same HID") Cc: Bingbu Cao bingbu.cao@intel.com Reviewed-by: Andy Shevchenko andy@kernel.org Reviewed-by: Daniel Scally dan.scally@ideasonboard.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/pci/intel/ipu-bridge.c | 7 +++---- drivers/media/pci/intel/ipu-bridge.h | 1 + 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/media/pci/intel/ipu-bridge.c b/drivers/media/pci/intel/ipu-bridge.c index 38fa756602bc0..88490ea304dee 100644 --- a/drivers/media/pci/intel/ipu-bridge.c +++ b/drivers/media/pci/intel/ipu-bridge.c @@ -220,7 +220,6 @@ static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge, struct ipu_sensor *sensor) { struct software_node *nodes = sensor->swnodes; - char vcm_name[ACPI_ID_LEN + 4];
ipu_bridge_init_swnode_names(sensor);
@@ -240,10 +239,10 @@ static void ipu_bridge_create_connection_swnodes(struct ipu_bridge *bridge, sensor->ipu_properties); if (sensor->ssdb.vcmtype) { /* append ssdb.link to distinguish VCM nodes with same HID */ - snprintf(vcm_name, sizeof(vcm_name), "%s-%u", - ipu_vcm_types[sensor->ssdb.vcmtype - 1], + snprintf(sensor->node_names.vcm, sizeof(sensor->node_names.vcm), + "%s-%u", ipu_vcm_types[sensor->ssdb.vcmtype - 1], sensor->ssdb.link); - nodes[SWNODE_VCM] = NODE_VCM(vcm_name); + nodes[SWNODE_VCM] = NODE_VCM(sensor->node_names.vcm); }
ipu_bridge_init_swnode_group(sensor); diff --git a/drivers/media/pci/intel/ipu-bridge.h b/drivers/media/pci/intel/ipu-bridge.h index d35b5f30ac3fc..1ff0b2d04d929 100644 --- a/drivers/media/pci/intel/ipu-bridge.h +++ b/drivers/media/pci/intel/ipu-bridge.h @@ -104,6 +104,7 @@ struct ipu_node_names { char port[7]; char endpoint[11]; char remote_port[7]; + char vcm[16]; };
struct ipu_sensor_config {