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From:   Chen Ni <nichen@iscas.ac.cn>
To:     s.shtylyov@omp.ru, dlemoal@kernel.org, jeff@garzik.org,
        htejun@gmail.com
Cc:     linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org,
        Chen Ni <nichen@iscas.ac.cn>
Subject: [PATCH] pata_isapnp: Add check for devm_ioport_map
Date:   Tue, 31 Oct 2023 04:00:07 +0000
Message-Id: <20231031040007.2498659-1-nichen@iscas.ac.cn>
MIME-Version: 1.0
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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@iscas.ac.cn>
---
 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