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Message-ID: <9d2e3526bd30e9f307eab32b67f487fa4ab102eb.camel@mediatek.com>
Date: Fri, 14 Jul 2023 06:45:38 +0000
From: Jason-JH Lin (林睿祥)
<Jason-JH.Lin@...iatek.com>
To: CK Hu (胡俊光) <ck.hu@...iatek.com>,
"amergnat@...libre.com" <amergnat@...libre.com>,
"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
"angelogioacchino.delregno@...labora.com"
<angelogioacchino.delregno@...labora.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mediatek@...ts.infradead.org"
<linux-mediatek@...ts.infradead.org>,
Singo Chang (張興國)
<Singo.Chang@...iatek.com>,
Johnson Wang (王聖鑫)
<Johnson.Wang@...iatek.com>,
Jason-ch Chen (陳建豪)
<Jason-ch.Chen@...iatek.com>,
Shawn Sung (宋孝謙)
<Shawn.Sung@...iatek.com>,
Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
Project_Global_Chrome_Upstream_Group
<Project_Global_Chrome_Upstream_Group@...iatek.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"matthias.bgg@...il.com" <matthias.bgg@...il.com>
Subject: Re: [PATCH v3 3/4] drm/mediatek: Add casting before assign
Hi CK,
Thanks for the reviews.
On Fri, 2023-07-14 at 05:45 +0000, CK Hu (胡俊光) wrote:
> Hi, Jason:
>
> On Wed, 2023-06-21 at 18:22 +0800, Jason-JH.Lin wrote:
> > 1. Add casting before assign to avoid the unintentional integer
> > overflow or unintended sign extension.
> > 2. Add a int varriable for multiplier calculation instead of
> > calculating
> > different types multiplier with dma_addr_t varriable directly.
>
> I agree with these modification, but the title does not match the
> modification.
>
> Regards,
> CK
I'll change the title and commit msg at the next version below:
Fix unintentional integer overflow in multiplying different types
1. Instead of multiplying 2 variable of different types. Change to
assign a value of one variable and then multiply the other variable.
2. Add a int variable for multiplier calculation instead of calculating
different types multiplier with dma_addr_t variable directly.
Thanks!
Regards,
Jason-JH.Lin
>
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