firmware: ti_sci: Parse all resource ranges even if some is not available

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

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index b47e33e7411f..86b272751c52 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3180,6 +3180,7 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
                             struct device *dev, u32 dev_id, char *of_prop)
 {
         struct ti_sci_resource *res;
+        bool valid_set = false;
         u32 resource_subtype;
         int i, ret;
 
@@ -3210,15 +3211,18 @@ 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, "dev = %d subtype %d not allocated for this host\n",
+                        dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n",
                                 dev_id, resource_subtype);
-                        return ERR_PTR(ret);
+                        res->desc[i].start = 0;
+                        res->desc[i].num = 0;
+                        continue;
                 }
 
                 dev_dbg(dev, "dev = %d, subtype = %d, start = %d, num = %d\n",
                         dev_id, resource_subtype, res->desc[i].start,
                         res->desc[i].num);
 
+                valid_set = true;
                 res->desc[i].res_map =
                         devm_kzalloc(dev, BITS_TO_LONGS(res->desc[i].num) *
                                      sizeof(*res->desc[i].res_map), GFP_KERNEL);
@@ -3227,7 +3231,10 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
         }
         raw_spin_lock_init(&res->lock);
 
-        return res;
+        if (valid_set)
+                return res;
+
+        return ERR_PTR(-EINVAL);
 }
 
 static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode,