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Fri, 9 Aug 2019 14:18:02 +0000 From: Stephen Douthit To: Tony Luck , Borislav Petkov , Mauro Carvalho Chehab , James Morse CC: Stephen Douthit , "linux-edac@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd_reg() Thread-Topic: [PATCH] EDAC, pnd2: Fix ioremap() size in dnv_rd_reg() Thread-Index: AQHVTr1AyXwgab8zJESZbW4mAIpUAw== Date: Fri, 9 Aug 2019 14:18:02 +0000 Message-ID: <20190809141737.15580-1-stephend@silicom-usa.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BN6PR2001CA0027.namprd20.prod.outlook.com (2603:10b6:405:16::13) To VI1PR0402MB2717.eurprd04.prod.outlook.com (2603:10a6:800:b4::11) authentication-results: spf=none (sender IP is ) smtp.mailfrom=stephend@silicom-usa.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.21.0 x-originating-ip: [96.82.2.57] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 05df1eaa-ba6a-4ca9-3518-08d71cd4632e x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:VI1PR0402MB3774; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: silicom-usa.com X-MS-Exchange-CrossTenant-Network-Message-Id: 05df1eaa-ba6a-4ca9-3518-08d71cd4632e X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Aug 2019 14:18:02.0960 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c9e326d8-ce47-4930-8612-cc99d3c87ad1 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: xGPj2o197h/0xpFYOatlg1N2WOFxsOgIREdt/tGCKsqp9NYOVLsNbv2l1pjGFJSJw+eP5UdhnSzkc7+lx8M+RYCN3fa5P3cvTpFDlq0dYGk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB3774 Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org Depending on how BIOS has marked the reserved region containing the 32KB MCHBAR you can get warnings like: resource sanity check: requesting [mem 0xfed10000-0xfed1ffff], which spans = more than reserved [mem 0xfed10000-0xfed17fff] caller dnv_rd_reg+0xc8/0x240 [pnd2_edac] mapping multiple BARs Not all of the mmio regions used in dnv_rd_reg() are the same size. The MCHBAR window is 32KB and the sideband ports are 64KB. Pass the correct size to ioremap() depending on which resource we're reading from. Signed-off-by: Stephen Douthit --- drivers/edac/pnd2_edac.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c index 903a4f1fadcc..0153c730750e 100644 --- a/drivers/edac/pnd2_edac.c +++ b/drivers/edac/pnd2_edac.c @@ -268,11 +268,14 @@ static u64 get_sideband_reg_base_addr(void) } } =20 +#define DNV_MCHBAR_SIZE 0x8000 +#define DNV_SB_PORT_SIZE 0x10000 static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, ch= ar *name) { struct pci_dev *pdev; char *base; u64 addr; + unsigned long size; =20 if (op =3D=3D 4) { pdev =3D pci_get_device(PCI_VENDOR_ID_INTEL, 0x1980, NULL); @@ -287,15 +290,17 @@ static int dnv_rd_reg(int port, int off, int op, void= *data, size_t sz, char *na addr =3D get_mem_ctrl_hub_base_addr(); if (!addr) return -ENODEV; + size =3D DNV_MCHBAR_SIZE; } else { /* MMIO via sideband register base address */ addr =3D get_sideband_reg_base_addr(); if (!addr) return -ENODEV; addr +=3D (port << 16); + size =3D DNV_SB_PORT_SIZE; } =20 - base =3D ioremap((resource_size_t)addr, 0x10000); + base =3D ioremap((resource_size_t)addr, size); if (!base) return -ENODEV; =20 --=20 2.21.0