linux-kernel - RE: [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd

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Date:   Fri, 9 Aug 2019 07:07:32 +0000
From:   "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>
To:     Stephen Douthit <stephend@...icom-usa.com>,
        "Luck, Tony" <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        James Morse <james.morse@....com>
CC:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd_reg() from 64K
 -> 32K

> 
> BIOS has marked the 32K MCHBAR window as reserved, so when dnv_rd_reg()
> tries to ioremap() a 64KB region you get warnings like:
> 
> resource sanity check: requesting [mem 0xfed10000-0xfed1ffff], which spans
> more than reserved [mem 0xfed10000-0xfed17fff] caller
> dnv_rd_reg+0xc8/0x240 [pnd2_edac] mapping multiple BARs
> 
> ioremap() the correct size on Denverton platforms to get rid of those warnings.

I've several dmesg logs for loading the pnd2_edac driver on a Denverton server successfully. But the logs haven't got such warning.

-Qiuxu