of: reserved_mem: Add missing IORESOURCE_MEM flag on resources

JIRA: https://issues.redhat.com/browse/RHEL-125402

commit aea7096
Author: Rob Herring (Arm) <robh@kernel.org>
Date:   2025-08-20 14:28:04 -0500

    of: reserved_mem: Add missing IORESOURCE_MEM flag on resources

    Commit f4fcfdd ('of: reserved_mem: Add functions to parse
    "memory-region"') failed to set IORESOURCE_MEM flag on the resources.
    The result is functions such as devm_ioremap_resource_wc() will fail.
    Add the missing flag.

    Fixes: f4fcfdd ('of: reserved_mem: Add functions to parse "memory-region"')
    Reported-by: Iuliana Prodan <iuliana.prodan@nxp.com>
    Reported-by: Daniel Baluta <daniel.baluta@gmail.com>
    Tested-by: Iuliana Prodan <iuliana.prodan@nxp.com>
    Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>
    Reviewed-by: Saravana Kannan <saravanak@google.com>
    Link: https://lore.kernel.org/r/20250820192805.565568-1-robh@kernel.org
    Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Signed-off-by: Maxime Ripard <mripard@redhat.com>

Author: Maxime Ripard

drivers/of/of_reserved_mem.c

@@ -779,6 +779,7 @@ int of_reserved_mem_region_to_resource(const struct device_node *np,
 		return -EINVAL;
 
 	resource_set_range(res, rmem->base, rmem->size);
+	res->flags = IORESOURCE_MEM;
 	res->name = rmem->name;
 	return 0;
 }