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bh=xYkmJ/OdKUndVT1CuPr9J8refiPRMUq7ilyeAaA5ma8=; b=h9MgXR/zNNjYmYAeodUvrt3UgOjnQJf3KTBwvr3M2r/4k1qeH3hBV/uh45Slmk0uWgGe2DAsf/5HHL6dPiqd0Wx9GAdOnStc28FjrDvhyzZSjLu0tY8SKK1rmnk0Fh78alK+JEZwwPN/DGcxEBzLEuPuVpOPLDKKhgbIF+30TX4= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , , , , , Ayan Kumar Halder Subject: [XEN v4 3/3] xen/drivers: ns16550: Fix an incorrect assignment to uart->io_size Date: Tue, 24 Jan 2023 12:23:36 +0000 Message-ID: <20230124122336.40993-4-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230124122336.40993-1-ayan.kumar.halder@amd.com> References: <20230124122336.40993-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000C973:EE_|MN0PR12MB5882:EE_ X-MS-Office365-Filtering-Correlation-Id: 6139d27d-a81e-49cd-c9e0-08dafe05f557 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jan 2023 12:24:36.9715 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6139d27d-a81e-49cd-c9e0-08dafe05f557 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000C973.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5882 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1674563123597100011 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" uart->io_size represents the size in bytes. Thus, when serial_port.bit_width is assigned to it, it should be converted to size in bytes. Fixes: 17b516196c ("ns16550: add ACPI support for ARM only") Reported-by: Jan Beulich Signed-off-by: Ayan Kumar Halder Reviewed-by: Stefano Stabellini --- Changes from - v1, v2 - NA (New patch introduced in v3). v3 - Added Reviewed-by and Reported-by tags. xen/drivers/char/ns16550.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c index 43e1f971ab..092f6b9c4b 100644 --- a/xen/drivers/char/ns16550.c +++ b/xen/drivers/char/ns16550.c @@ -1870,7 +1870,7 @@ static int __init ns16550_acpi_uart_init(const void *= data) uart->parity =3D spcr->parity; uart->stop_bits =3D spcr->stop_bits; uart->io_base =3D spcr->serial_port.address; - uart->io_size =3D spcr->serial_port.bit_width; + uart->io_size =3D DIV_ROUND_UP(spcr->serial_port.bit_width, BITS_PER_B= YTE); uart->reg_shift =3D spcr->serial_port.bit_offset; uart->reg_width =3D spcr->serial_port.access_width; =20 --=20 2.17.1