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f3718a818f
linux/drivers/gpu/drm
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Linus Torvalds f3718a818f Revert "nouveau/bios: Fix tracking of BIOS image data" 
This reverts commit d06221c061.

It turns out to trigger the "BUG_ON(!PageCompound(page))" in kfree(),
apparently because the code ends up trying to free somethng that was
never kmalloced in the first place.

BenH points out that the patch was untested and wasn't meant to go into
the upstream kernel that quickly in the first place.

Backtrace:
  bios_shadow
  bios_shadow_prom
  nv_mask
  init_io
  bios_shadow
  nouveau_bios_init
  NVReadVgaCrtc
  NVSetOwner
  nouveau_card_init
  nouveau_load

Reported-by: Meelis Roos <mroos@linux.ee>
Requested-by: Dave Airlie <airlied@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-04-04 08:16:25 -07:00
..
exynos Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-03-22 13:08:22 -07:00
gma500 gma500: medfield: fix build without CONFIG_BACKLIGHT_CLASS_DEVICE 2012-03-26 09:33:24 +01:00
i2c drm: add convenience function to create an range property 2012-02-09 10:15:25 +00:00
i810 drm: drop setting vm_file to filp 2012-03-05 11:19:08 +00:00
i915 drm/i915: treat src w & h as fixed point in sprite handling code 2012-04-03 11:33:33 +02:00
mga drm: move pci bus master enable into driver. 2012-02-16 18:31:07 +00:00
nouveau Revert "nouveau/bios: Fix tracking of BIOS image data" 2012-04-04 08:16:25 -07:00
r128 drm: move pci bus master enable into driver. 2012-02-16 18:31:07 +00:00
radeon drm/radeon: Don't dereference possibly-NULL pointer. 2012-04-02 11:09:50 +01:00
savage drivers/gpu/drm/savage/savage_state.c: add missing kfree 2012-03-20 08:45:31 +00:00
sis drm: move pci bus master enable into driver. 2012-02-16 18:31:07 +00:00
tdfx drm: Make the per-driver file_operations struct const 2011-11-11 11:14:47 +00:00
ttm Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-03-22 13:08:22 -07:00
udl mm, drm/udl: fixup vma flags on mmap 2012-04-02 11:08:17 +01:00
via drm: move pci bus master enable into driver. 2012-02-16 18:31:07 +00:00
vmwgfx Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2012-03-22 13:08:22 -07:00
ati_pcigart.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_agpsupport.c
drm_auth.c drm: Fix authentication kernel crash 2012-01-25 09:27:45 +00:00
drm_buffer.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_bufs.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_cache.c drm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:17 +08:00
drm_context.c drm: make DRM_UNLOCKED ioctls with their own mutex 2012-01-05 14:43:02 +00:00
drm_crtc_helper.c drm: allow loading an EDID as firmware to override broken monitor 2012-03-20 10:09:28 +00:00
drm_crtc.c drm/usb: move usb support into a separate module 2012-03-20 06:59:29 +00:00
drm_debugfs.c drm: serialize access to list of debugfs files 2011-11-11 11:05:19 +00:00
drm_dma.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_dp_i2c_helper.c
drm_drv.c drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
drm_edid_load.c drm: allow loading an EDID as firmware to override broken monitor 2012-03-20 10:09:28 +00:00
drm_edid_modes.h drm/edid: support CEA video modes. 2011-12-19 14:53:16 +00:00
drm_edid.c drm: remove unneeded redefinition of DDC_ADDR 2012-03-21 10:19:53 +00:00
drm_encoder_slave.c gpu: add module.h to drivers/gpu files as required. 2011-10-31 19:32:03 -04:00
drm_fb_helper.c drm: Validate requested virtual size against allocated fb size 2012-04-03 11:18:46 +01:00
drm_fops.c drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
drm_gem.c drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
drm_global.c
drm_hashtab.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_info.c
drm_ioc32.c drivers/gpu/drm/drm_ioc32.c: initialize all fields 2012-02-03 09:47:32 +00:00
drm_ioctl.c drm: add some caps for userspace to discover more info for dumb KMS driver (v2) 2012-02-16 18:35:11 +00:00
drm_irq.c drm: remove unused code 2012-02-29 10:18:29 +00:00
drm_lock.c drm: add missing exports for i810 driver. 2011-12-22 19:09:01 +00:00
drm_memory.c drm: remove unused code 2012-02-29 10:18:29 +00:00
drm_mm.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_modes.c drm: Add drm_mode_copy() 2012-03-15 09:52:51 +00:00
drm_pci.c drm: move pci bus master enable into driver. 2012-02-16 18:31:07 +00:00
drm_platform.c drm: cope with platformdev->id == -1 2012-03-07 14:03:40 +00:00
drm_prime.c drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
drm_proc.c gpu: Add export.h as required to drivers/gpu files. 2011-10-31 19:32:03 -04:00
drm_scatter.c
drm_stub.c drm/usb: move usb support into a separate module 2012-03-20 06:59:29 +00:00
drm_sysfs.c drm/sysfs: protect sysfs removal code against being run twice. 2012-03-15 13:35:31 +00:00
drm_trace_points.c
drm_trace.h
drm_usb.c drm: fix build with UDL if USB is a module 2012-03-16 09:28:03 +00:00
drm_vm.c drm: add core support for unplugging a device (v2) 2012-03-15 13:35:33 +00:00
Kconfig drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
Makefile drm: base prime/dma-buf support (v5) 2012-03-30 11:52:44 +01:00
README.drm

README.drm 

************************************************************
* For the very latest on DRI development, please see:      *
*     http://dri.freedesktop.org/                          *
************************************************************

The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).

The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:

    1. The DRM provides synchronized access to the graphics hardware via
       the use of an optimized two-tiered lock.

    2. The DRM enforces the DRI security policy for access to the graphics
       hardware by only allowing authenticated X11 clients access to
       restricted regions of memory.

    3. The DRM provides a generic DMA engine, complete with multiple
       queues and the ability to detect the need for an OpenGL context
       switch.

    4. The DRM is extensible via the use of small device-specific modules
       that rely extensively on the API exported by the DRM module.


Documentation on the DRI is available from:
    http://dri.freedesktop.org/wiki/Documentation
    http://sourceforge.net/project/showfiles.php?group_id=387
    http://dri.sourceforge.net/doc/

For specific information about kernel-level support, see:

    The Direct Rendering Manager, Kernel Support for the Direct Rendering
    Infrastructure
    http://dri.sourceforge.net/doc/drm_low_level.html

    Hardware Locking for the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/hardware_locking_low_level.html

    A Security Analysis of the Direct Rendering Infrastructure
    http://dri.sourceforge.net/doc/security_low_level.html