linux-kernel - Re: [PATCH] ata: hpt366: fix incorrect mask when checking at cmd_high

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Date:	Tue, 12 Jul 2016 13:27:26 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Colin King <colin.king@...onical.com>
Cc:	kernel-tram@...ts.ubuntu.com, Tejun Heo <tj@...nel.org>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Subject: Re: [PATCH] ata: hpt366: fix incorrect mask when checking at
 cmd_high_time


Hi,

On Tuesday, July 12, 2016 12:16:19 PM Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> According to the HPT366 data sheet, PCI config space dword 0x40-0x43
> bits 11:8 specify the primary drive cmd_high_time, however,
> currently just 3 bits of the 4 are being used because the mask
> is 0x700 and not 0x0f00.  Fix the mask, allowing for the 40MHz clock
> to be detected.
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>

Thanks for the patch, could you also fix also the old driver
(drivers/ide/hpt366.c)?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> ---
>  drivers/ata/pata_hpt366.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
> index e5fb752..a219a50 100644
> --- a/drivers/ata/pata_hpt366.c
> +++ b/drivers/ata/pata_hpt366.c
> @@ -368,7 +368,7 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
>  
>  	/* PCI clocking determines the ATA timing values to use */
>  	/* info_hpt366 is safe against re-entry so we can scribble on it */
> -	switch ((reg1 & 0x700) >> 8) {
> +	switch ((reg1 & 0xf00) >> 8) {
>  	case 9:
>  		hpriv = &hpt366_40;
>  		break;