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Re: [PATCH 5/5] [media] winbond-cir: Move a variable assignment in two functions

From "David Härdeman" <david@hardeman.nu>
Newsgroups linux.kernel
Subject Re: [PATCH 5/5] [media] winbond-cir: Move a variable assignment in two functions
Date 2016-10-19 16:30 +0200
Message-ID <stZSP-2nd-119@gated-at.bofh.it> (permalink)
References <ss99U-JJ-31@gated-at.bofh.it> <qEuGl-43C-5@gated-at.bofh.it> <ss99T-JJ-1@gated-at.bofh.it> <ss99U-JJ-31@gated-at.bofh.it>
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October 14, 2016 1:45 PM, "SF Markus Elfring" <elfring@users.sourceforge.net> wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Fri, 14 Oct 2016 13:13:11 +0200
> 
> Move the assignment for the local variable "data" behind the source code
> for condition checks by these functions.

Why?

> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
> drivers/media/rc/winbond-cir.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
> index 3d286b9..716b1fe 100644
> --- a/drivers/media/rc/winbond-cir.c
> +++ b/drivers/media/rc/winbond-cir.c
> @@ -566,7 +566,7 @@ wbcir_set_carrier_report(struct rc_dev *dev, int enable)
> static int
> wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
> {
> - struct wbcir_data *data = dev->priv;
> + struct wbcir_data *data;
> unsigned long flags;
> u8 val;
> u32 freq;
> @@ -592,6 +592,7 @@ wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
> break;
> }
> 
> + data = dev->priv;
> spin_lock_irqsave(&data->spinlock, flags);
> if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
> spin_unlock_irqrestore(&data->spinlock, flags);
> @@ -611,7 +612,7 @@ wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
> static int
> wbcir_txmask(struct rc_dev *dev, u32 mask)
> {
> - struct wbcir_data *data = dev->priv;
> + struct wbcir_data *data;
> unsigned long flags;
> u8 val;
> 
> @@ -637,6 +638,7 @@ wbcir_txmask(struct rc_dev *dev, u32 mask)
> return -EINVAL;
> }
> 
> + data = dev->priv;
> spin_lock_irqsave(&data->spinlock, flags);
> if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
> spin_unlock_irqrestore(&data->spinlock, flags);
> -- 
> 2.10.1

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[PATCH 0/5] [media] winbond-cir: Fine-tuning for four function  implementations SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
  [PATCH 2/5] [media] winbond-cir: Move a variable assignment in  wbcir_tx() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
    Re: [PATCH 2/5] [media] winbond-cir: Move a variable assignment  in wbcir_tx() "David Härdeman" <david@hardeman.nu> - 2016-10-19 17:40 +0200
      Re: [media] winbond-cir: Move a variable assignment in wbcir_tx() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 18:30 +0200
  [PATCH 5/5] [media] winbond-cir: Move a variable assignment in two  functions SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
    Re: [PATCH 5/5] [media] winbond-cir: Move a variable assignment  in two functions "David Härdeman" <david@hardeman.nu> - 2016-10-19 16:30 +0200
  [PATCH 4/5] [media] winbond-cir: One variable and its check less in  wbcir_shutdown() after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
    Re: [PATCH 4/5] [media] winbond-cir: One variable and its check less  in wbcir_shutdown() after error detection Sean Young <sean@mess.org> - 2016-10-15 15:40 +0200
      Re: [PATCH 4/5] [media] winbond-cir: One variable and its check less  in wbcir_shutdown() after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-15 18:50 +0200
        Re: [PATCH 4/5] [media] winbond-cir: One variable and its check  less in wbcir_shutdown() after error detection "David Härdeman" <david@hardeman.nu> - 2016-10-19 16:30 +0200
          Re: [PATCH 4/5] [media] winbond-cir: One variable and its check less  in wbcir_shutdown() after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 18:30 +0200
      Re: [PATCH 4/5] [media] winbond-cir: One variable and its check  less in wbcir_shutdown() after error detection "David Härdeman" <david@hardeman.nu> - 2016-10-19 16:30 +0200
  [PATCH 1/5] [media] winbond-cir: Use kmalloc_array() in wbcir_tx() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
    Re: [PATCH 1/5] [media] winbond-cir: Use kmalloc_array() in  wbcir_tx() "David Härdeman" <david@hardeman.nu> - 2016-10-19 17:40 +0200
  [PATCH 3/5] [media] winbond-cir: Move assignments for three variables  in wbcir_shutdown() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-14 13:50 +0200
    Re: [PATCH 3/5] [media] winbond-cir: Move assignments for three  variables in wbcir_shutdown() "David Härdeman" <david@hardeman.nu> - 2016-10-19 16:30 +0200
      Re: [media] winbond-cir: Move assignments for three variables in  wbcir_shutdown() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 16:30 +0200
        Re: [media] winbond-cir: Move assignments for three variables in  wbcir_shutdown() "David Härdeman" <david@hardeman.nu> - 2016-10-19 17:50 +0200
  Re: [media] winbond-cir: Move a variable assignment in two functions SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 16:20 +0200
  Re: [media] winbond-cir: Move a variable assignment in wbcir_tx() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 16:20 +0200
  Re: [media] winbond-cir: Move assignments for three variables in  wbcir_shutdown() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 16:20 +0200
  Re: [media] winbond-cir: Move a variable assignment in wbcir_tx() "David Härdeman" <david@hardeman.nu> - 2016-10-19 16:30 +0200

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