linux-kernel - [PATCH 5.10/5.15 0/1] drm/i915: Fix possible int overflow in skl_ddi_calculate

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Message-ID: <20240919143607.14178-1-n.zhandarovich@fintech.ru>
Date: Thu, 19 Sep 2024 07:36:06 -0700
From: Nikita Zhandarovich <n.zhandarovich@...tech.ru>
To: <stable@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Nikita Zhandarovich <n.zhandarovich@...tech.ru>, Jani Nikula
	<jani.nikula@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
	"Joonas Lahtinen" <joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin
	<tursulin@...ulin.net>, David Airlie <airlied@...il.com>,
	<intel-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>,
	<lvc-patches@...uxtesting.org>
Subject: [PATCH 5.10/5.15 0/1] drm/i915: Fix possible int overflow in skl_ddi_calculate_wrpll()

This patch addresses issues of integer overflow and possibly erroneous
integer promotion in skl_ddi_calculate_wrpll() and
skl_ddi_hdmi_pll_dividers() in kernel versions 5.10 and 5.15.

The problem has been fixed in upstream and stable versions up to 6.1
with commit:
5b5115726601 ("drm/i915: Fix possible int overflow in skl_ddi_calculate_wrpll()")

Due to changes to skl_ddi_calculate_wrpll() return value the patch had
to be slightly modified during cherry-picking, leaving the original
fix intact, and can now be cleanly applied to 5.10 and 5.15 kernels.