From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756042Ab2ATVZp (ORCPT ); Fri, 20 Jan 2012 16:25:45 -0500 Received: from mgw2.diku.dk ([130.225.96.92]:40273 "EHLO mgw2.diku.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754339Ab2ATVZk (ORCPT ); Fri, 20 Jan 2012 16:25:40 -0500 From: Julia Lawall To: Florian Tobias Schandinat Cc: kernel-janitors@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] drivers/video/au*fb.c: use devm_ functions Date: Fri, 20 Jan 2012 22:25:30 +0100 Message-Id: <1327094732-9050-3-git-send-email-Julia.Lawall@lip6.fr> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1327094732-9050-1-git-send-email-Julia.Lawall@lip6.fr> References: <1327094732-9050-1-git-send-email-Julia.Lawall@lip6.fr> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Julia Lawall The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. Signed-off-by: Julia Lawall --- In the case of au1100fb.c, should the failed label return something other than 0? In the case of au1200fb.c, should the error-handling code under the new call to dma_alloc_noncoherent jump to failed, like the other error handling code? I was not sure that there was actually anything for failed to do at this point in the function. drivers/video/au1100fb.c | 30 +++++++++++------------------- drivers/video/au1200fb.c | 9 +-------- 2 files changed, 12 insertions(+), 27 deletions(-) diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c index de9da67..8f7b7d7 100644 --- a/drivers/video/au1100fb.c +++ b/drivers/video/au1100fb.c @@ -477,7 +477,8 @@ static int __devinit au1100fb_drv_probe(struct platform_device *dev) u32 sys_clksrc; /* Allocate new device private */ - fbdev = kzalloc(sizeof(struct au1100fb_device), GFP_KERNEL); + fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device), + GFP_KERNEL); if (!fbdev) { print_err("fail to allocate device private record"); return -ENOMEM; @@ -498,8 +499,9 @@ static int __devinit au1100fb_drv_probe(struct platform_device *dev) au1100fb_fix.mmio_start = regs_res->start; au1100fb_fix.mmio_len = resource_size(regs_res); - if (!request_mem_region(au1100fb_fix.mmio_start, au1100fb_fix.mmio_len, - DRIVER_NAME)) { + if (!devm_request_mem_region(au1100fb_fix.mmio_start, + au1100fb_fix.mmio_len, + DRIVER_NAME)) { print_err("fail to lock memory region at 0x%08lx", au1100fb_fix.mmio_start); return -EBUSY; @@ -514,8 +516,9 @@ static int __devinit au1100fb_drv_probe(struct platform_device *dev) fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; - fbdev->fb_mem = dma_alloc_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), - &fbdev->fb_phys, GFP_KERNEL); + fbdev->fb_mem = dmam_alloc_coherent(&dev->dev, &dev->dev, + PAGE_ALIGN(fbdev->fb_len), + &fbdev->fb_phys, GFP_KERNEL); if (!fbdev->fb_mem) { print_err("fail to allocate frambuffer (size: %dK))", fbdev->fb_len / 1024); @@ -557,14 +560,14 @@ static int __devinit au1100fb_drv_probe(struct platform_device *dev) fbdev->info.fbops = &au1100fb_ops; fbdev->info.fix = au1100fb_fix; - if (!(fbdev->info.pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL))) { + fbdev->info.pseudo_palette = + devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL); + if (!fbdev->info.pseudo_palette) return -ENOMEM; - } if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) { print_err("Fail to allocate colormap (%d entries)", AU1100_LCD_NBR_PALETTE_ENTRIES); - kfree(fbdev->info.pseudo_palette); return -EFAULT; } @@ -582,9 +585,6 @@ static int __devinit au1100fb_drv_probe(struct platform_device *dev) return 0; failed: - if (fbdev->regs) { - release_mem_region(fbdev->regs_phys, fbdev->regs_len); - } if (fbdev->fb_mem) { dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem, fbdev->fb_phys); @@ -592,7 +592,6 @@ failed: if (fbdev->info.cmap.len != 0) { fb_dealloc_cmap(&fbdev->info.cmap); } - kfree(fbdev); platform_set_drvdata(dev, NULL); return 0; @@ -615,14 +614,7 @@ int au1100fb_drv_remove(struct platform_device *dev) /* Clean up all probe data */ unregister_framebuffer(&fbdev->info); - release_mem_region(fbdev->regs_phys, fbdev->regs_len); - - dma_free_coherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), fbdev->fb_mem, - fbdev->fb_phys); - fb_dealloc_cmap(&fbdev->info.cmap); - kfree(fbdev->info.pseudo_palette); - kfree((void*)fbdev); return 0; } diff --git a/drivers/video/au1200fb.c b/drivers/video/au1200fb.c index 04e4479..3e9a773 100644 --- a/drivers/video/au1200fb.c +++ b/drivers/video/au1200fb.c @@ -1724,7 +1724,7 @@ static int __devinit au1200fb_drv_probe(struct platform_device *dev) /* Allocate the framebuffer to the maximum screen size */ fbdev->fb_len = (win->w[plane].xres * win->w[plane].yres * bpp) / 8; - fbdev->fb_mem = dma_alloc_noncoherent(&dev->dev, + fbdev->fb_mem = dmam_alloc_noncoherent(&dev->dev, &dev->dev, PAGE_ALIGN(fbdev->fb_len), &fbdev->fb_phys, GFP_KERNEL); if (!fbdev->fb_mem) { @@ -1788,9 +1788,6 @@ static int __devinit au1200fb_drv_probe(struct platform_device *dev) failed: /* NOTE: This only does the current plane/window that failed; others are still active */ - if (fbdev->fb_mem) - dma_free_noncoherent(&dev->dev, PAGE_ALIGN(fbdev->fb_len), - fbdev->fb_mem, fbdev->fb_phys); if (fbi) { if (fbi->cmap.len != 0) fb_dealloc_cmap(&fbi->cmap); @@ -1817,10 +1814,6 @@ static int __devexit au1200fb_drv_remove(struct platform_device *dev) /* Clean up all probe data */ unregister_framebuffer(fbi); - if (fbdev->fb_mem) - dma_free_noncoherent(&dev->dev, - PAGE_ALIGN(fbdev->fb_len), - fbdev->fb_mem, fbdev->fb_phys); if (fbi->cmap.len != 0) fb_dealloc_cmap(&fbi->cmap); kfree(fbi->pseudo_palette);