From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Roel Kluin <roel.kluin@gmail.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
linux-ide@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] atiixp: missing parentheses?
Date: Tue, 17 Feb 2009 17:25:38 +0300 [thread overview]
Message-ID: <499AC8E2.60406@ru.mvista.com> (raw)
In-Reply-To: <499AB75F.6060709@gmail.com>
Roel Kluin wrote:
> This looks odd, is below what was intended? note that timing_shift can
> only be 16, 8 or 0. Maybe intended was 24, 16, 8 or 0? then we should do:
Looking at the libata driver, yes, it should be 0, 8, 16, and 24.
> int timing_shift = ((drive->dn & 2) ? 16 : 0) + ((drive->dn & 1) ? 0 : 8);
> --------------------------->8-------------8<------------------------------
> Add missing parentheses
> Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
> diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
> index b2735d2..b7813ec 100644
> --- a/drivers/ide/atiixp.c
> +++ b/drivers/ide/atiixp.c
> @@ -52,7 +52,7 @@ static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
> {
> struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
> unsigned long flags;
> - int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
> + int timing_shift = (drive->dn & 2) ? 16 : 0 + ((drive->dn & 1) ? 0 : 8);
> u32 pio_timing_data;
> u16 pio_mode_data;
>
> @@ -85,7 +85,7 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
> {
> struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
> unsigned long flags;
> - int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
> + int timing_shift = (drive->dn & 2) ? 16 : 0 + ((drive->dn & 1) ? 0 : 8);
> u32 tmp32;
> u16 tmp16;
> u16 udma_ctl = 0;
Why didn't you add parens around the first ?: then? They are surely
needed. Though this clearly needs to be simplified to (drive->dn * 8).
MBR, Sergei
next prev parent reply other threads:[~2009-02-17 14:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-17 13:10 [PATCH] atiixp: missing parentheses? Roel Kluin
2009-02-17 14:25 ` Sergei Shtylyov [this message]
2009-02-17 14:26 ` Sergei Shtylyov
2009-02-17 15:10 ` Bartlomiej Zolnierkiewicz
2009-02-17 15:37 ` Roel Kluin
2009-02-18 18:53 ` Bartlomiej Zolnierkiewicz
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