Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933040Ab0DHRRN (ORCPT ); Thu, 8 Apr 2010 13:17:13 -0400 Received: from tex.lwn.net ([70.33.254.29]:46469 "EHLO vena.lwn.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932653Ab0DHRQu (ORCPT ); Thu, 8 Apr 2010 13:16:50 -0400 From: Jonathan Corbet To: linux-kernel@vger.kernel.org Cc: Florian Tobias Schandinat , Harald Welte , JosephChan@via.com.tw, ScottFang@viatech.com.cn, Deepak Saxena , linux-fbdev-devel@lists.sourceforge.net Subject: [PATCH 01/16] [FB] viafb: Fix various resource leaks during module_init() Date: Thu, 8 Apr 2010 11:15:31 -0600 Message-Id: <1270746946-12467-2-git-send-email-corbet@lwn.net> X-Mailer: git-send-email 1.7.0.1 In-Reply-To: <1270746946-12467-1-git-send-email-corbet@lwn.net> References: <1270746946-12467-1-git-send-email-corbet@lwn.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4717 Lines: 141 From: Harald Welte The current code executed from module_init() in viafb does not have proper error checking and [partial] resoure release paths in case an error happens half way through driver initialization. This patch adresses the most obvious of those issues, such as a leftover i2c bus if module_init (and thus module load) fails. [jc: fixed merge conflicts] Signed-off-by: Harald Welte --- drivers/video/via/viafbdev.c | 52 ++++++++++++++++++++++++++++++----------- 1 files changed, 38 insertions(+), 14 deletions(-) diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c index 3028e7d..91bfe6d 100644 --- a/drivers/video/via/viafbdev.c +++ b/drivers/video/via/viafbdev.c @@ -1,5 +1,5 @@ /* - * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved. + * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved. * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved. * This program is free software; you can redistribute it and/or @@ -1847,7 +1847,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { u32 default_xres, default_yres; - int vmode_index; + int rc, vmode_index; u32 viafb_par_length; DEBUG_MSG(KERN_INFO "VIAFB PCI Probe!!\n"); @@ -1862,7 +1862,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, &pdev->dev); if (!viafbinfo) { printk(KERN_ERR"Could not allocate memory for viafb_info.\n"); - return -ENODEV; + return -ENOMEM; } viaparinfo = (struct viafb_par *)viafbinfo->par; @@ -1886,7 +1886,9 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, viafb_dual_fb = 0; /* Set up I2C bus stuff */ - viafb_create_i2c_bus(viaparinfo); + rc = viafb_create_i2c_bus(viaparinfo); + if (rc) + goto out_fb_release; viafb_init_chip_info(pdev, ent); viaparinfo->fbmem = pci_resource_start(pdev, 0); @@ -1897,7 +1899,8 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, viaparinfo->memsize); if (!viafbinfo->screen_base) { printk(KERN_INFO "ioremap failed\n"); - return -ENOMEM; + rc = -EIO; + goto out_delete_i2c; } viafbinfo->fix.mmio_start = pci_resource_start(pdev, 1); @@ -1988,8 +1991,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, if (!viafbinfo1) { printk(KERN_ERR "allocate the second framebuffer struct error\n"); - framebuffer_release(viafbinfo); - return -ENOMEM; + goto out_delete_i2c; } viaparinfo1 = viafbinfo1->par; memcpy(viaparinfo1, viaparinfo, viafb_par_length); @@ -2044,21 +2046,26 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, viaparinfo->depth = fb_get_color_depth(&viafbinfo->var, &viafbinfo->fix); default_var.activate = FB_ACTIVATE_NOW; - fb_alloc_cmap(&viafbinfo->cmap, 256, 0); + rc = fb_alloc_cmap(&viafbinfo->cmap, 256, 0); + if (rc) + goto out_fb1_release; if (viafb_dual_fb && (viafb_primary_dev == LCD_Device) && (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)) { - if (register_framebuffer(viafbinfo1) < 0) - return -EINVAL; + rc = register_framebuffer(viafbinfo1); + if (rc) + goto out_dealloc_cmap; } - if (register_framebuffer(viafbinfo) < 0) - return -EINVAL; + rc = register_framebuffer(viafbinfo); + if (rc) + goto out_fb1_unreg_lcd_cle266; if (viafb_dual_fb && ((viafb_primary_dev != LCD_Device) || (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266))) { - if (register_framebuffer(viafbinfo1) < 0) - return -EINVAL; + rc = register_framebuffer(viafbinfo1); + if (rc) + goto out_fb_unreg; } DEBUG_MSG(KERN_INFO "fb%d: %s frame buffer device %dx%d-%dbpp\n", viafbinfo->node, viafbinfo->fix.id, default_var.xres, @@ -2067,6 +2074,23 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, viafb_init_proc(&viaparinfo->shared->proc_entry); viafb_init_dac(IGA2); return 0; + +out_fb_unreg: + unregister_framebuffer(viafbinfo); +out_fb1_unreg_lcd_cle266: + if (viafb_dual_fb && (viafb_primary_dev == LCD_Device) + && (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)) + unregister_framebuffer(viafbinfo1); +out_dealloc_cmap: + fb_dealloc_cmap(&viafbinfo->cmap); +out_fb1_release: + if (viafbinfo1) + framebuffer_release(viafbinfo1); +out_delete_i2c: + viafb_delete_i2c_buss(viaparinfo); +out_fb_release: + framebuffer_release(viafbinfo); + return rc; } static void __devexit via_pci_remove(struct pci_dev *pdev) -- 1.7.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/