Hi Jeff,
I am not finding any new comments on this.
Could you please ACK this patch so that it can be applied on external list.
--Prabhakar
> -----Original Message-----
> From: Kushwaha Prabhakar-B32579
> Sent: Wednesday, March 09, 2011 12:47 PM
> To: linux-...@vger.kernel.org
> Cc: linuxppc-dev@lists.ozlabs.org; jgar...@pobox.com;
> meet2pra...@gmail.com; Kushwaha Prabhakar-B32579; Kalra Ashish-B00888
> Subject: [PATCH][v3] driver/FSL SATA:Fix wrong Device Error Register
> usage
>
> When a single device error is detected, the device under the error is
> indicated by the error bit set in the DER. There is a one to one mapping
> between register bit and devices on Port multiplier(PMP) i.e. bit 0
> represents PMP device 0 and bit 1 represents PMP device 1 etc.
>
> Current implementation treats Device error register value as device
> number not set of bits representing multiple device on PMP. It is changed
> to consider bit level.
> No need to check for each set bit as all command is going to be aborted.
>
> Signed-off-by: Ashish Kalra <b00...@freescale.com>
> Signed-off-by: Prabhakar Kushwaha <prabha...@freescale.com>
> ---
>
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
> (branch master)
>
> This patch is already gone through review of linuxppc-dev mail list.
> Making CC linuxppc-dev@lists.ozlabs.org
>
> Changes for v2: Incorporated Sergei Shtylyov's comment
> - Put space after -
> - added a line
> Changes for v3: Incorporated David Laight's comment
> - Condition check for dereg 0 for hardware error
>
> drivers/ata/sata_fsl.c | 7 +++++--
> 1 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c index
> b0214d0..ad84ddc 100644
> --- a/drivers/ata/sata_fsl.c
> +++ b/drivers/ata/sata_fsl.c
> @@ -1040,12 +1040,15 @@ static void sata_fsl_error_intr(struct ata_port
> *ap)
>
> /* find out the offending link and qc */
> if (ap->nr_pmp_links) {
> + unsigned int dev_num;
> +
> dereg = ioread32(hcr_base + DE);
> iowrite32(dereg, hcr_base + DE);
> iowrite32(cereg, hcr_base + CE);
>
> - if (dereg < ap->nr_pmp_links) {
> - link = &ap->pmp_link[dereg];
> + dev_num = ffs(dereg) - 1;
> + if (dev_num < ap->nr_pmp_links && dereg != 0) {
> + link = &ap->pmp_link[dev_num];
> ehi = &link->eh_info;
> qc = ata_qc_from_tag(ap, link->active_tag);
> /*
> --
> 1.7.3
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