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bh=5mGRDEaxCT5Vc+hDapbIEiqvewhZapa+H6B636bxP5M=; b=fIF9l37l+P5/oG56WnqX+cAxtnnOPpsXFHjRG/dsLmudBoXTosES/Iyu9nUpUHbEsO/DKBvG4VB5xeqjon5nkfHpLAmKDMWaBLpavre/dt2yE2tY2fVqnYyRXlQXvc/FmUeynP6CmSiHwOUySgAgpd911en3x/odbFXnlkYD3CI= 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=SATLEXMB04.amd.com; pr=C From: Ayan Kumar Halder To: CC: , , , , , , , , , , Ayan Kumar Halder Subject: [XEN v3 3/3] xen/drivers: ns16550: Fix an incorrect assignment to uart->io_size Date: Mon, 23 Jan 2023 13:44:51 +0000 Message-ID: <20230123134451.47185-4-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230123134451.47185-1-ayan.kumar.halder@amd.com> References: <20230123134451.47185-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0000C404:EE_|IA0PR12MB8225:EE_ X-MS-Office365-Filtering-Correlation-Id: af5965ca-5167-482d-6424-08dafd481e69 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: 23 Jan 2023 13:45:41.5573 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: af5965ca-5167-482d-6424-08dafd481e69 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0000C404.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8225 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1674481564179100001 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: 17b516196c55 ("ns16550: add ACPI support for ARM only") Signed-off-by: Ayan Kumar Halder Reviewed-by: Stefano Stabellini --- Changes from - v1, v2 - NA (New patch introduced in v3). 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