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

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Message-ID: <98a14fa23e4fb81d4630264cba0cecc8@208suo.com>
Date:   Tue, 18 Jul 2023 16:09:03 +0800
From:   sunran001@...suo.com
To:     davem@...emloft.net
Cc:     sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] floppy: 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 ERROR:
./arch/sparc/include/asm/floppy_64.h:595:3-9: ERROR: missing put_device;
call of_find_device_by_node on line 589, but without a corresponding
object release within this function.

Signed-off-by: Ran Sun <sunran001@...suo.com>
---
  arch/sparc/include/asm/floppy_64.h | 1 +
  1 file changed, 1 insertion(+)

diff --git a/arch/sparc/include/asm/floppy_64.h 
b/arch/sparc/include/asm/floppy_64.h
index 070c8c1f5c8f..e74a4d4e6519 100644
--- a/arch/sparc/include/asm/floppy_64.h
+++ b/arch/sparc/include/asm/floppy_64.h
@@ -592,6 +592,7 @@ static unsigned long __init sun_floppy_init(void)

          state_prop = of_get_property(op->dev.of_node, "status", NULL);
          if (state_prop && !strncmp(state_prop, "disabled", 8))
+            put_device(&op->dev);
              return 0;

          FLOPPY_IRQ = op->archdata.irqs[0];