[U-Boot] [PATCH] firmware: ti_sci: Parse all resource ranges even if some is not available

[Andreas Dannenberg]

From: Vignesh Raghavendra <vigneshr at ti.com>

Do not fail if any of the requested subtypes are not available, but set the
number of resources to 0 and continue parsing the resource ranges.

Based on Linux kernel patch by Peter Ujfalusi <peter.ujfalusi at ti.com>

Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
---
 drivers/firmware/ti_sci.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 1fd29f2cdf..62b1dc2006 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3170,6 +3170,7 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 	u32 resource_subtype;
 	u16 resource_type;
 	struct ti_sci_resource *res;
+	bool valid_set = false;
 	int sets, i, ret;
 	u32 *temp;
 
@@ -3209,12 +3210,15 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 							&res->desc[i].start,
 							&res->desc[i].num);
 		if (ret) {
-			dev_err(dev, "type %d subtype %d not allocated for host %d\n",
+			dev_dbg(dev, "type %d subtype %d not allocated for host %d\n",
 				resource_type, resource_subtype,
 				handle_to_ti_sci_info(handle)->host_id);
-			return ERR_PTR(ret);
+			res->desc[i].start = 0;
+			res->desc[i].num = 0;
+			continue;
 		}
 
+		valid_set = true;
 		dev_dbg(dev, "res type = %d, subtype = %d, start = %d, num = %d\n",
 			resource_type, resource_subtype, res->desc[i].start,
 			res->desc[i].num);
@@ -3226,7 +3230,10 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 			return ERR_PTR(-ENOMEM);
 	}
 
-	return res;
+	if (valid_set)
+		return res;
+
+	return ERR_PTR(-EINVAL);
 }
 
 /* Description for K2G */
-- 
2.17.1