[PATCH 1/1] EDAC/igen6: Fix conversion of system address to physical memory address

[PATCH 1/1] EDAC/igen6: Fix conversion of system address to physical memory address

[Qiuxu Zhuo]

The conversion of system address to physical memory address (as viewed by
the memory controller) by igen6_edac is incorrect when the system address
is above the TOM (Total amount Of populated physical Memory) for Elkhart
Lake and Ice Lake (Neural Network Processor). Fix this conversion.

Fixes: 10590a9d4f23 ("EDAC/igen6: Add EDAC driver for Intel client SoCs using IBECC")
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
---
 drivers/edac/igen6_edac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c
index 0fe75eed8973..189a2fc29e74 100644
--- a/drivers/edac/igen6_edac.c
+++ b/drivers/edac/igen6_edac.c
@@ -316,7 +316,7 @@ static u64 ehl_err_addr_to_imc_addr(u64 eaddr, int mc)
 	if (igen6_tom <= _4GB)
 		return eaddr + igen6_tolud - _4GB;
 
-	if (eaddr < _4GB)
+	if (eaddr >= igen6_tom)
 		return eaddr + igen6_tolud - igen6_tom;
 
 	return eaddr;
-- 
2.17.1

Re: [PATCH 1/1] EDAC/igen6: Fix conversion of system address to physical memory address

[Greg KH]

On Wed, Aug 14, 2024 at 02:10:11PM +0800, Qiuxu Zhuo wrote:
> The conversion of system address to physical memory address (as viewed by
> the memory controller) by igen6_edac is incorrect when the system address
> is above the TOM (Total amount Of populated physical Memory) for Elkhart
> Lake and Ice Lake (Neural Network Processor). Fix this conversion.
> 
> Fixes: 10590a9d4f23 ("EDAC/igen6: Add EDAC driver for Intel client SoCs using IBECC")
> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
> ---
>  drivers/edac/igen6_edac.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c
> index 0fe75eed8973..189a2fc29e74 100644
> --- a/drivers/edac/igen6_edac.c
> +++ b/drivers/edac/igen6_edac.c
> @@ -316,7 +316,7 @@ static u64 ehl_err_addr_to_imc_addr(u64 eaddr, int mc)
>  	if (igen6_tom <= _4GB)
>  		return eaddr + igen6_tolud - _4GB;
>  
> -	if (eaddr < _4GB)
> +	if (eaddr >= igen6_tom)
>  		return eaddr + igen6_tolud - igen6_tom;
>  
>  	return eaddr;
> -- 
> 2.17.1
> 
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

Re: [PATCH 1/1] EDAC/igen6: Fix conversion of system address to physical memory address

[kernel test robot]

Hi,

Thanks for your patch.

FYI: kernel test robot notices the stable kernel rule is not satisfied.

The check is based on https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html#option-1

Rule: add the tag "Cc: stable@vger.kernel.org" in the sign-off area to have the patch automatically included in the stable tree.
Subject: [PATCH 1/1] EDAC/igen6: Fix conversion of system address to physical memory address
Link: https://lore.kernel.org/stable/20240814061011.43545-1-qiuxu.zhuo%40intel.com

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki