[PATCH] sparc: kernel: add missing put_device()

[PATCH] sparc: kernel: add missing put_device()

[sunran001]

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/pci_psycho.c:308:2-8: ERROR: missing put_device;
call of_find_device_by_node on line 290, but without a corresponding
object release within this function.
./arch/sparc/kernel/pci_psycho.c:350:0-1: ERROR: missing put_device;
call of_find_device_by_node on line 290, but without a corresponding
object release within this function.

Signed-off-by: Ran Sun <sunran001@208suo.com>
---
  arch/sparc/kernel/pci_psycho.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/arch/sparc/kernel/pci_psycho.c 
b/arch/sparc/kernel/pci_psycho.c
index f413371da387..45f8370bbfad 100644
--- a/arch/sparc/kernel/pci_psycho.c
+++ b/arch/sparc/kernel/pci_psycho.c
@@ -305,6 +305,7 @@ static void psycho_register_error_handlers(struct 
pci_pbm_info *pbm)
       */

      if (op->archdata.num_irqs < 6)
+        put_device(op->dev);
          return;

      /* We really mean to ignore the return result here.  Two
@@ -347,6 +348,7 @@ static void psycho_register_error_handlers(struct 
pci_pbm_info *pbm)
          PSYCHO_PCICTRL_EEN);
      tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
      upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
+    put_device(op->dev);
  }

  /* PSYCHO boot time probing and initialization. */

Re: [PATCH] sparc: kernel: add missing put_device()

[Sam Ravnborg]

Hi Ran Sun,

On Tue, Jul 18, 2023 at 03:26:31PM +0800, sunran001@208suo.com wrote:
> 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/pci_psycho.c:308:2-8: ERROR: missing put_device;
> call of_find_device_by_node on line 290, but without a corresponding
> object release within this function.
> ./arch/sparc/kernel/pci_psycho.c:350:0-1: ERROR: missing put_device;
> call of_find_device_by_node on line 290, but without a corresponding
> object release within this function.
> 
> Signed-off-by: Ran Sun <sunran001@208suo.com>
> ---
>  arch/sparc/kernel/pci_psycho.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/sparc/kernel/pci_psycho.c b/arch/sparc/kernel/pci_psycho.c
> index f413371da387..45f8370bbfad 100644
> --- a/arch/sparc/kernel/pci_psycho.c
> +++ b/arch/sparc/kernel/pci_psycho.c
> @@ -305,6 +305,7 @@ static void psycho_register_error_handlers(struct
> pci_pbm_info *pbm)
>       */
> 
>      if (op->archdata.num_irqs < 6)
> +        put_device(op->dev);
>          return;

Missing {}

	Sam

> 
>      /* We really mean to ignore the return result here.  Two
> @@ -347,6 +348,7 @@ static void psycho_register_error_handlers(struct
> pci_pbm_info *pbm)
>          PSYCHO_PCICTRL_EEN);
>      tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
>      upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
> +    put_device(op->dev);
>  }
> 
>  /* PSYCHO boot time probing and initialization. */