opp: Fix required-opps phandle array count check

Pavankumar Kondeti · vireshk · commit 8b7912f4cb6c · 2021-10-04T12:23:09.000+05:30
The 'required-opps' property is optional. So of_count_phandle_with_args()
can return -ENOENT when queried for required-opps. Handle this case.

Signed-off-by: Pavankumar Kondeti &lt;pkondeti@codeaurora.org&gt;
Signed-off-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
@@ -170,7 +170,7 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,
 	}
 
 	count = of_count_phandle_with_args(np, "required-opps", NULL);
-	if (!count)
+	if (count <= 0)
 		goto put_np;
 
 	required_opp_tables = kcalloc(count, sizeof(*required_opp_tables),

Original file line number	Diff line number	Diff line change
`@@ -170,7 +170,7 @@ static void _opp_table_alloc_required_tables(struct opp_table *opp_table,`
`170`	`170`	`}`
`171`	`171`
`172`	`172`	`count = of_count_phandle_with_args(np, "required-opps", NULL);`
`173`		`- if (!count)`
	`173`	`+ if (count <= 0)`
`174`	`174`	`goto put_np;`
`175`	`175`
`176`	`176`	`required_opp_tables = kcalloc(count, sizeof(*required_opp_tables),`