[PATCH 03/16] irqchip/sifive-plic: do not iounmap devm mappings

[Haofeng Li]

From: Haofeng Li <lihaofeng at kylinos.cn>

plic_probe() maps registers with of_iomap() on the OF path, but with
devm_platform_ioremap_resource() on the ACPI/platform path.
fail_free_regs always calls iounmap(regs), which double-unmaps managed
mappings on the non-OF path.

Only call iounmap(regs) when the fwnode is an OF node.

Fixes: 206dd13a1011 ("irqchip/sifive-plic: Add ACPI support")
Signed-off-by: Haofeng Li <lihaofeng at kylinos.cn>
---
 drivers/irqchip/irq-sifive-plic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 5b0dac104814..0bddad388741 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -819,7 +819,9 @@ static int plic_probe(struct fwnode_handle *fwnode)
 fail_free_priv:
 	kfree(priv);
 fail_free_regs:
-	iounmap(regs);
+	/* Only OF path uses of_iomap(); ACPI/platform uses devm mapping. */
+	if (is_of_node(fwnode))
+		iounmap(regs);
 	return error;
 }
 
-- 
2.25.1