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platform/x86: intel: chtwc_int33fe: don't dereference swnode args

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Members of struct software_node_ref_args should not be dereferenced
directly but set using the provided macros. Commit d7cdbbc93c
("software node: allow referencing firmware nodes") changed the name of
the software node member and caused a build failure. Remove all direct
dereferences of the ref struct as a fix.

However, this driver also seems to abuse the software node interface by
waiting for a node with an arbitrary name "intel-xhci-usb-sw" to appear
in the system before setting up the reference for the I2C device, while
the actual software node already exists in the intel-xhci-usb-role-switch
module and should be used to set up a static reference. Add a FIXME for
a future improvement.

Fixes: d7cdbbc93c ("software node: allow referencing firmware nodes")
Fixes: 53c24c2932 ("platform/x86: intel_cht_int33fe: use inline reference properties")
Cc: stable@vger.kernel.org
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/all/20251121111534.7cdbfe5c@canb.auug.org.au/
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Bartosz Golaszewski
2025-11-21 11:04:50 +01:00
committed by Philipp Zabel
parent 5fc4e4cf7a
commit 527250cd90
1 changed files with 20 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/platform/x86/intel/chtwc_int33fe.c
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@@ -77,7 +77,7 @@ static const struct software_node max17047_node = {
* software node.
*/
static struct software_node_ref_args fusb302_mux_refs[] = {
{ .node = NULL },
SOFTWARE_NODE_REFERENCE(NULL),
};
static const struct property_entry fusb302_properties[] = {
@@ -190,11 +190,6 @@ static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data)
{
software_node_unregister_node_group(node_group);
if (fusb302_mux_refs[0].node) {
fwnode_handle_put(software_node_fwnode(fusb302_mux_refs[0].node));
fusb302_mux_refs[0].node = NULL;
}
if (data->dp) {
data->dp->secondary = NULL;
fwnode_handle_put(data->dp);
@@ -202,7 +197,15 @@ static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data)
}
}
static int cht_int33fe_add_nodes(struct cht_int33fe_data *data)
static void cht_int33fe_put_swnode(void *data)
{
struct fwnode_handle *fwnode = data;
fwnode_handle_put(fwnode);
fusb302_mux_refs[0] = SOFTWARE_NODE_REFERENCE(NULL);
}
static int cht_int33fe_add_nodes(struct device *dev, struct cht_int33fe_data *data)
{
const struct software_node *mux_ref_node;
int ret;
@@ -212,17 +215,25 @@ static int cht_int33fe_add_nodes(struct cht_int33fe_data *data)
* until the mux driver has created software node for the mux device.
* It means we depend on the mux driver. This function will return
* -EPROBE_DEFER until the mux device is registered.
*
* FIXME: the relevant software node exists in intel-xhci-usb-role-switch
* and - if exported - could be used to set up a static reference.
*/
mux_ref_node = software_node_find_by_name(NULL, "intel-xhci-usb-sw");
if (!mux_ref_node)
return -EPROBE_DEFER;
ret = devm_add_action_or_reset(dev, cht_int33fe_put_swnode,
software_node_fwnode(mux_ref_node));
if (ret)
return ret;
/*
* Update node used in "usb-role-switch" property. Note that we
* rely on software_node_register_node_group() to use the original
* instance of properties instead of copying them.
*/
fusb302_mux_refs[0].node = mux_ref_node;
fusb302_mux_refs[0] = SOFTWARE_NODE_REFERENCE(mux_ref_node);
ret = software_node_register_node_group(node_group);
if (ret)
@@ -345,7 +356,7 @@ static int cht_int33fe_typec_probe(struct platform_device *pdev)
return fusb302_irq;
}
ret = cht_int33fe_add_nodes(data);
ret = cht_int33fe_add_nodes(dev, data);
if (ret)
return ret;