From patchwork Wed Nov 17 15:26:54 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 333001 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oAHFRoir000582 for ; Wed, 17 Nov 2010 15:28:11 GMT Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 75F52A0F38 for ; Wed, 17 Nov 2010 07:27:50 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.17.8]) by gabe.freedesktop.org (Postfix) with ESMTP id 34C41A0E26 for ; Wed, 17 Nov 2010 07:27:41 -0800 (PST) Received: from localhost.localdomain (deibp9eh1--blueice3n2.emea.ibm.com [195.212.29.180]) by mrelayeu.kundenserver.de (node=mreu1) with ESMTP (Nemesis) id 0LaHYA-1OdKMn0uNy-00lRFJ; Wed, 17 Nov 2010 16:27:16 +0100 From: Arnd Bergmann To: Linus Torvalds Subject: [PATCH 2/7] drm/i810: remove the BKL Date: Wed, 17 Nov 2010 16:26:54 +0100 Message-Id: <1290007619-5787-3-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1290007619-5787-1-git-send-email-arnd@arndb.de> References: <1290007619-5787-1-git-send-email-arnd@arndb.de> X-Provags-ID: V02:K0:Ce4fCsOQqK9fEP4MyYTwP5qD/0PhezmKfl/jTd1hDlZ dvc7GyzhvVG4yWom2wAgsI7c5ZQ7uljYDmAo5lVeLH21QEl3qO iYUxChKE/k5QeEIv0gIDKjDcA/GpYG+sE+/ZJhVbnR7KJz6hqZ 7cLaWCxaSs9LsGHbyki1kKdyZxdN+mlXxffLRNYTb9NTa/mpGx Sz1S4k7H+Btm4jmyl8f9A== Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Arnd Bergmann X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org Errors-To: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 17 Nov 2010 15:28:11 +0000 (UTC) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 7af4436..ddc122f 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -73,8 +73,8 @@ source "drivers/gpu/drm/radeon/Kconfig" config DRM_I810 tristate "Intel I810" - # BKL usage in order to avoid AB-BA deadlocks, may become BROKEN_ON_SMP - depends on DRM && AGP && AGP_INTEL && BKL + # !PREEMPT because of missing ioctl locking + depends on DRM && AGP && AGP_INTEL && (!PREEMPT || BROKEN) help Choose this option if you have an Intel I810 graphics card. If M is selected, the module will be called i810. AGP support is required diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c index ff33e53..8f371e8 100644 --- a/drivers/gpu/drm/i810/i810_dma.c +++ b/drivers/gpu/drm/i810/i810_dma.c @@ -37,7 +37,6 @@ #include /* For task queue support */ #include #include -#include #include #define I810_BUF_FREE 2 @@ -94,7 +93,6 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma) struct drm_buf *buf; drm_i810_buf_priv_t *buf_priv; - lock_kernel(); dev = priv->minor->dev; dev_priv = dev->dev_private; buf = dev_priv->mmap_buffer; @@ -104,7 +102,6 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma) vma->vm_file = filp; buf_priv->currently_mapped = I810_BUF_MAPPED; - unlock_kernel(); if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, @@ -116,7 +113,7 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma) static const struct file_operations i810_buffer_fops = { .open = drm_open, .release = drm_release, - .unlocked_ioctl = i810_ioctl, + .unlocked_ioctl = drm_ioctl, .mmap = i810_mmap_buffers, .fasync = drm_fasync, .llseek = noop_llseek, @@ -1242,19 +1239,6 @@ int i810_driver_dma_quiescent(struct drm_device *dev) return 0; } -/* - * call the drm_ioctl under the big kernel lock because - * to lock against the i810_mmap_buffers function. - */ -long i810_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - int ret; - lock_kernel(); - ret = drm_ioctl(file, cmd, arg); - unlock_kernel(); - return ret; -} - struct drm_ioctl_desc i810_ioctls[] = { DRM_IOCTL_DEF_DRV(I810_INIT, i810_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I810_VERTEX, i810_dma_vertex, DRM_AUTH|DRM_UNLOCKED), diff --git a/drivers/gpu/drm/i810/i810_drv.c b/drivers/gpu/drm/i810/i810_drv.c index 88bcd33..0152fa2 100644 --- a/drivers/gpu/drm/i810/i810_drv.c +++ b/drivers/gpu/drm/i810/i810_drv.c @@ -57,7 +57,7 @@ static struct drm_driver driver = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, - .unlocked_ioctl = i810_ioctl, + .unlocked_ioctl = drm_ioctl, .mmap = drm_mmap, .poll = drm_poll, .fasync = drm_fasync, @@ -79,6 +79,10 @@ static struct drm_driver driver = { static int __init i810_init(void) { + if (num_possible_cpus() > 1) { + pr_err("drm/i810 does not support SMP\n"); + return -EINVAL; + } driver.num_ioctls = i810_max_ioctl; return drm_init(&driver); }