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d="scan'208";a="4911783" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.244.30]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2026 05:18:27 -0700 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 27 Oct 2026 14:18:24 +0200 (EET) To: Greg Kroah-Hartman cc: Jiri Slaby , Joshua Rogers , Chris Mason , Josef Bacik , Tony Lindgren , Rafael Gago Castano , Florian Fainelli , Andy Shevchenko , Peter Hurley , Heikki Krogerus , Crescent Hsieh , Frank Li , Sherry Sun , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Manivannan Sadhasivam , Olof Johansson , =?ISO-8859-15?Q?Andreas_F=E4rber?= , Arnd Bergmann , Krzysztof Kozlowski , Peter Griffin , Alim Akhtar , Robert Baldyga , Thomas Abraham , Kukjin Kim , Patrice Chotard , Srinivas Kandagatla , Maxime Coquelin , Alexandre Torgue , Andy Shevchenko , Vladimir Zapolskiy , Al Cooper , LKML , linux-serial , stable , Broadcom internal kernel review list Subject: Re: [PATCH 09/24] serial: 8250: 8250_bcm7271: fix DMA address truncation to 32 bits In-Reply-To: <20261027-tty-llm-v1-9-99b0202ae546@linuxfoundation.org> Message-ID: References: <20261027-tty-llm-v1-0-99b0202ae546@linuxfoundation.org> <20261027-tty-llm-v1-9-99b0202ae546@linuxfoundation.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="8323328-1814154233-1793103504=:1182" This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323328-1814154233-1793103504=:1182 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE On Tue, 27 Oct 2026, Greg Kroah-Hartman wrote: > From: Joshua Rogers >=20 > The local variable daddr is declared as u32 but assigned from dma_addr_t > fields (priv->rx_addr and priv->tx_addr), which are 64-bit on ARM64. > This silently truncates the upper 32 bits, causing upper_32_bits(daddr) > to always produce zero when programming the UART DMA descriptor high > address registers. Change the type to dma_addr_t to preserve the full > DMA address. >=20 > Cc: Al Cooper > Cc: Jiri Slaby > Cc: stable > Cc: Broadcom internal kernel review list > Signed-off-by: Joshua Rogers > Signed-off-by: Greg Kroah-Hartman > --- > drivers/tty/serial/8250/8250_bcm7271.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) >=20 > diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/= 8250/8250_bcm7271.c > index 974d9af146a1..4fdd261e55f5 100644 > --- a/drivers/tty/serial/8250/8250_bcm7271.c > +++ b/drivers/tty/serial/8250/8250_bcm7271.c > @@ -315,7 +315,7 @@ static int brcmuart_arbitration(struct brcmuart_priv = *priv, bool acquire) > =20 > static void brcmuart_init_dma_hardware(struct brcmuart_priv *priv) > { > -=09u32 daddr; > +=09dma_addr_t daddr; > =09u32 value; > =09int x; Reviewed-by: Ilpo J=C3=A4rvinen --=20 i. --8323328-1814154233-1793103504=:1182--