* [PATCH] tx4939ide: remove wmb()
@ 2009-03-31 16:15 Atsushi Nemoto
2009-03-31 16:36 ` Grant Grundler
2009-04-02 19:11 ` Bartlomiej Zolnierkiewicz
0 siblings, 2 replies; 4+ messages in thread
From: Atsushi Nemoto @ 2009-03-31 16:15 UTC (permalink / raw)
To: Grant Grundler
Cc: Bartlomiej Zolnierkiewicz, linux-ide, linux-mips, linux-kernel
* define CHECK_DMA_MASK
* remove use of wmb()
Suggested-by: Grant Grundler <grundler@google.com>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
This patch is against linux-next 20090331.
drivers/ide/tx4939ide.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index cc269c0..48186ae 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -327,15 +327,15 @@ static int tx4939ide_dma_end(ide_drive_t *drive)
/* read and clear the INTR & ERROR bits */
dma_stat = tx4939ide_clear_dma_status(base);
- wmb();
+#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
/* verify good DMA status */
- if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
+ if ((dma_stat & CHECK_DMA_MASK) == 0 &&
(ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
(TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
/* INT_IDE lost... bug? */
return 0;
- return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
+ return ((dma_stat & CHECK_DMA_MASK) !=
ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
}
--
1.5.6.3
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] tx4939ide: remove wmb()
2009-03-31 16:15 [PATCH] tx4939ide: remove wmb() Atsushi Nemoto
@ 2009-03-31 16:36 ` Grant Grundler
2009-04-02 19:18 ` Bartlomiej Zolnierkiewicz
2009-04-02 19:11 ` Bartlomiej Zolnierkiewicz
1 sibling, 1 reply; 4+ messages in thread
From: Grant Grundler @ 2009-03-31 16:36 UTC (permalink / raw)
To: Atsushi Nemoto
Cc: Bartlomiej Zolnierkiewicz, linux-ide, linux-mips, linux-kernel
On Tue, Mar 31, 2009 at 9:15 AM, Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:
> * define CHECK_DMA_MASK
> * remove use of wmb()
>
> Suggested-by: Grant Grundler <grundler@google.com>
Thank you for the attribution!
But I think proper header would be:
Reported-by: Grant Grundler <grundler@google.com>
But in this case, since i've looked at the code and am under the
illusion I understand it, I'm comfortable with:
Reviewed-by: Grant Grundler <grundler@google.com>
thanks!
grant
> Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
> ---
> This patch is against linux-next 20090331.
>
> drivers/ide/tx4939ide.c | 6 +++---
> 1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
> index cc269c0..48186ae 100644
> --- a/drivers/ide/tx4939ide.c
> +++ b/drivers/ide/tx4939ide.c
> @@ -327,15 +327,15 @@ static int tx4939ide_dma_end(ide_drive_t *drive)
> /* read and clear the INTR & ERROR bits */
> dma_stat = tx4939ide_clear_dma_status(base);
>
> - wmb();
> +#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
>
> /* verify good DMA status */
> - if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
> + if ((dma_stat & CHECK_DMA_MASK) == 0 &&
> (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
> (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
> /* INT_IDE lost... bug? */
> return 0;
> - return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
> + return ((dma_stat & CHECK_DMA_MASK) !=
> ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
> }
>
> --
> 1.5.6.3
>
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] tx4939ide: remove wmb()
2009-03-31 16:36 ` Grant Grundler
@ 2009-04-02 19:18 ` Bartlomiej Zolnierkiewicz
0 siblings, 0 replies; 4+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2009-04-02 19:18 UTC (permalink / raw)
To: Grant Grundler; +Cc: Atsushi Nemoto, linux-ide, linux-mips, linux-kernel
On Tuesday 31 March 2009, Grant Grundler wrote:
> On Tue, Mar 31, 2009 at 9:15 AM, Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:
> > * define CHECK_DMA_MASK
> > * remove use of wmb()
> >
> > Suggested-by: Grant Grundler <grundler@google.com>
>
> Thank you for the attribution!
>
> But I think proper header would be:
> Reported-by: Grant Grundler <grundler@google.com>
>
> But in this case, since i've looked at the code and am under the
> illusion I understand it, I'm comfortable with:
> Reviewed-by: Grant Grundler <grundler@google.com>
Well, you can have both! ;)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] tx4939ide: remove wmb()
2009-03-31 16:15 [PATCH] tx4939ide: remove wmb() Atsushi Nemoto
2009-03-31 16:36 ` Grant Grundler
@ 2009-04-02 19:11 ` Bartlomiej Zolnierkiewicz
1 sibling, 0 replies; 4+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2009-04-02 19:11 UTC (permalink / raw)
To: Atsushi Nemoto; +Cc: Grant Grundler, linux-ide, linux-mips, linux-kernel
On Tuesday 31 March 2009, Atsushi Nemoto wrote:
> * define CHECK_DMA_MASK
> * remove use of wmb()
>
> Suggested-by: Grant Grundler <grundler@google.com>
> Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
applied
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2009-04-02 19:36 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-03-31 16:15 [PATCH] tx4939ide: remove wmb() Atsushi Nemoto
2009-03-31 16:36 ` Grant Grundler
2009-04-02 19:18 ` Bartlomiej Zolnierkiewicz
2009-04-02 19:11 ` Bartlomiej Zolnierkiewicz
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).