Add check for devm_ioport_map() and return the error if it fails in
order to guarantee the success of devm_ioport_map().
Fixes: 0d5ff566779f ("libata: convert to iomap")
Signed-off-by: Chen Ni <nichen@xxxxxxxxxxx>
---
drivers/ata/pata_isapnp.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 25a63d043c8e..0f77e0424066 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -82,6 +82,9 @@ static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev
if (pnp_port_valid(idev, 1)) {
ctl_addr = devm_ioport_map(&idev->dev,
pnp_port_start(idev, 1), 1);
+ if (!ctl_addr)
+ return -ENOMEM;
+
ap->ioaddr.altstatus_addr = ctl_addr;
ap->ioaddr.ctl_addr = ctl_addr;
ap->ops = &isapnp_port_ops;
--
2.25.1
