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Wed, 10 Jun 2026 07:52:00 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 X-ThreadId: AveuuW7LIw6B Date: Wed, 10 Jun 2026 13:51:40 +0200 From: "Arnd Bergmann" To: "Josua Mayer" , "Frank Li" , "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Message-Id: In-Reply-To: <20260610-lx2160-pcie-fix-ranges-32bit-v1-1-98086fc5fb6b@solid-run.com> References: <20260610-lx2160-pcie-fix-ranges-32bit-v1-1-98086fc5fb6b@solid-run.com> Subject: Re: [PATCH] arm64: dts: lx2160a-rev2: avoid 32-bit pcie window system ram overlap Content-Type: text/plain Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260610_045203_375315_2D0A5713 X-CRM114-Status: GOOD ( 11.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 10, 2026, at 13:45, Josua Mayer wrote: > A 3GB non-prefetchable PCIe bus window can overlap with inbound DMA > addresses for low system RAM, so DMA transactions may be routed to a BAR > on the same host bridge instead of memory. > > Change the 32-bit non-prefetchable PCIe window back from 3GB to 1GB on all > controllers, avoiding that overlap while keeping the added 64-bit > prefetchable region. > > This partially reverts commit 9ed301397090 ("arm64: dts: lx2160a-rev2: > extend 32-bit and add 64-bit pci regions"). > > Fixes: 9ed301397090 ("arm64: dts: lx2160a-rev2: extend 32-bit and add > 64-bit pci regions") > Reported-by: Arnd Bergmann > Closes: > https://lore.kernel.org/r/9e6326f6-dad1-4169-a63c-e62ee5b341f2@app.fastmail.com > Signed-off-by: Josua Mayer Looks good to me, thanks for the fix! Acked-by: Arnd Bergmann