linux-kernel - [PATCH] sparc: add missing put

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Date:   Tue, 18 Jul 2023 15:19:08 +0800
From:   sunran001@...suo.com
To:     davem@...emloft.net
Cc:     sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] sparc: add missing put_device()

The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.

Detected by coccinelle with the following ERRORS:
./arch/sparc/kernel/of_device_common.c:23:1-7: ERROR: missing
put_device; call of_find_device_by_node on line 18, but without a
corresponding object release within this function.
./arch/sparc/kernel/of_device_common.c:36:1-7: ERROR: missing
put_device; call of_find_device_by_node on line 30, but without a
corresponding object release within this function.
./arch/sparc/kernel/of_device_common.c:50:1-7: ERROR: missing
put_device; call of_find_device_by_node on line 42, but without a
corresponding object release within this function.

Signed-off-by: Ran Sun <sunran001@...suo.com>
---
  arch/sparc/kernel/of_device_common.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/arch/sparc/kernel/of_device_common.c 
b/arch/sparc/kernel/of_device_common.c
index 60f86b837658..7851307de6d0 100644
--- a/arch/sparc/kernel/of_device_common.c
+++ b/arch/sparc/kernel/of_device_common.c
@@ -20,6 +20,7 @@ unsigned int irq_of_parse_and_map(struct device_node 
*node, int index)
      if (!op || index >= op->archdata.num_irqs)
          return 0;

+    put_device(op->dev);
      return op->archdata.irqs[index];
  }
  EXPORT_SYMBOL(irq_of_parse_and_map);
@@ -32,6 +33,7 @@ int of_address_to_resource(struct device_node *node, 
int index,
      if (!op || index >= op->num_resources)
          return -EINVAL;

+    put_device(op->dev);
      memcpy(r, &op->archdata.resource[index], sizeof(*r));
      return 0;
  }
@@ -45,6 +47,7 @@ void __iomem *of_iomap(struct device_node *node, int 
index)
      if (!op || index >= op->num_resources)
          return NULL;

+    put_device(op->dev);
      r = &op->archdata.resource[index];

      return of_ioremap(r, 0, resource_size(r), (char *) r->name);