linux-kernel - [PATCH] sim710: Fix resource leak by adding missing ioport

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Message-ID: <20251029032555.1476-1-vulab@iscas.ac.cn>
Date: Wed, 29 Oct 2025 11:25:55 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: "James E . J . Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>
Subject: [PATCH] sim710: Fix resource leak by adding missing ioport_unmap calls

The driver calls ioport_map() to map I/O ports in sim710_probe_common()
but never calls ioport_unmap() to release the mapping. This causes
resource leaks in both the error path when request_irq() fails and in
the normal device removal path via sim710_device_remove().

Add ioport_unmap() calls in the out_release error path and in
sim710_device_remove().

Fixes: 56fece20086e ("[PATCH] finally fix 53c700 to use the generic iomem infrastructure")
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 drivers/scsi/sim710.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/sim710.c b/drivers/scsi/sim710.c
index e519df68d603..70c75ab1453a 100644
--- a/drivers/scsi/sim710.c
+++ b/drivers/scsi/sim710.c
@@ -133,6 +133,7 @@ static int sim710_probe_common(struct device *dev, unsigned long base_addr,
  out_put_host:
 	scsi_host_put(host);
  out_release:
+	ioport_unmap(hostdata->base);
 	release_region(base_addr, 64);
  out_free:
 	kfree(hostdata);
@@ -148,6 +149,7 @@ static int sim710_device_remove(struct device *dev)
 
 	scsi_remove_host(host);
 	NCR_700_release(host);
+	ioport_unmap(hostdata->base);
 	kfree(hostdata);
 	free_irq(host->irq, host);
 	release_region(host->base, 64);
-- 
2.50.1.windows.1