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SubjectRe: [PATCH] EDAC, ghes: use CPER module handles to locate DIMMs
On Wed, Aug 29, 2018 at 06:33:52PM +0000, Fan Wu wrote:
> The current ghes_edac driver does not update per-dimm error
> counters when reporting memory errors, because there is no
> platform-independent way to find DIMMs based on the error
> information provided by firmware. This patch offers a solution
> for platforms whose firmwares provide valid module handles
> (SMBIOS type 17) in error records. In this case ghes_edac will
> use the module handles to locate DIMMs and thus makes per-dimm
> error reporting possible.
>
> Signed-off-by: Fan Wu <wufan@codeaurora.org>
> ---
> drivers/edac/ghes_edac.c | 36 +++++++++++++++++++++++++++++++++---
> include/linux/edac.h | 2 ++
> 2 files changed, 35 insertions(+), 3 deletions(-)

If we're going to do this, it needs to be tested on an x86 box which loads
ghes_edac. Adding Toshi to Cc.

Otherwise it must remain ARM-specific.

> diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
> index 473aeec..db527f0 100644
> --- a/drivers/edac/ghes_edac.c
> +++ b/drivers/edac/ghes_edac.c
> @@ -81,6 +81,26 @@ static void ghes_edac_count_dimms(const struct dmi_header *dh, void *arg)
> (*num_dimm)++;
> }
>
> +static int ghes_edac_dimm_index(u16 handle)

get_dimm_smbios_handle()

> +{
> + struct mem_ctl_info *mci;
> + int i;
> +
> + if (!ghes_pvt)
> + return -1;

You don't need that test.

> +
> + mci = ghes_pvt->mci;
> +
> + if (!mci)
> + return -1;

Ditto.

> +
> + for (i = 0; i < mci->tot_dimms; i++) {
> + if (mci->dimms[i]->smbios_handle == handle)
> + return i;
> + }
> + return -1;
> +}
> +
> static void ghes_edac_dmidecode(const struct dmi_header *dh, void *arg)
> {
> struct ghes_edac_dimm_fill *dimm_fill = arg;
--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.
--

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