Re: [PATCH] pata_arasan_cf: declare/use 'qc' and 'ap' variables in arasan_cf_dma_start()

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On Thu, Oct 25, 2012 at 10:38 PM, Sergei Shtylyov
<sshtylyov@xxxxxxxxxxxxx> wrote:
> 'acdev->qc' and 'acdev->qc->ap' expressions are used multiple times in this
> function, so it makes sense to use the local variables for them.
>
> Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>

Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

> ---
> The patch is atop of the 'upstream' branch of libata-dev.git...
>
>  drivers/ata/pata_arasan_cf.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> Index: libata-dev/drivers/ata/pata_arasan_cf.c
> ===================================================================
> --- libata-dev.orig/drivers/ata/pata_arasan_cf.c
> +++ libata-dev/drivers/ata/pata_arasan_cf.c
> @@ -668,13 +668,15 @@ void arasan_cf_error_handler(struct ata_
>
>  static void arasan_cf_dma_start(struct arasan_cf_dev *acdev)
>  {
> +       struct ata_queued_cmd *qc = acdev->qc;
> +       struct ata_port *ap = qc->ap;
>         u32 xfer_ctr = readl(acdev->vbase + XFER_CTR) & ~XFER_DIR_MASK;
> -       u32 write = acdev->qc->tf.flags & ATA_TFLAG_WRITE;
> +       u32 write = qc->tf.flags & ATA_TFLAG_WRITE;
>
>         xfer_ctr |= write ? XFER_WRITE : XFER_READ;
>         writel(xfer_ctr, acdev->vbase + XFER_CTR);
>
> -       acdev->qc->ap->ops->sff_exec_command(acdev->qc->ap, &acdev->qc->tf);
> +       ap->ops->sff_exec_command(ap, &qc->tf);
>         ata_sff_queue_work(&acdev->work);
>  }
>
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