Skip to content

K
Kernel

openeuler / Kernel
接近 2 年 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 23 6月, 2005 4 次提交
    • D
      drm: 32/64-bit DRM ioctl compatibility patch · 9a186645
      由 Dave Airlie 提交于 
      The patch is against a 2.6.11 kernel tree.  I am running this with a
32-bit X server (compiled up from X.org CVS as of a couple of weeks
ago) and 32-bit DRI libraries and clients.  All the userland stuff is
identical to what I am using under a 32-bit kernel on my G4 powerbook
(which is a 32-bit machine of course).  I haven't tried compiling up a
64-bit X server or clients yet.

In the compatibility routines I have assumed that the kernel can
safely access user addresses after set_fs(KERNEL_DS).  That is, where
an ioctl argument structure contains pointers to other structures, and
those other structures are already compatible between the 32-bit and
64-bit ABIs (i.e. they only contain things like chars, shorts or
ints), I just check the address with access_ok() and then pass it
through to the 64-bit ioctl code.  I believe this approach may not
work on sparc64, but it does work on ppc64 and x86_64 at least.

One tricky area which may need to be revisited is the question of how
to handle the handles which we pass back to userspace to identify
mappings.  These handles are generated in the ADDMAP ioctl and then
passed in as the offset value to mmap.  However, offset values for
mmap seem to be generated in other ways as well, particularly for AGP
mappings.

The approach I have ended up with is to generate a fake 32-bit handle
only for _DRM_SHM mappings.  The handles for other mappings (AGP, REG,
FB) are physical addresses which are already limited to 32 bits, and
generating fake handles for them created all sorts of problems in the
mmap/nopage code.

This patch has been updated to use the new compatibility ioctls.

From: Paul Mackerras <paulus@samba.org>
Signed-off-by: NDave Airlie <airlied@linux.ie>
      9a186645
    • G
      [PATCH] driver core: Fix up the device_attach() error handling in bus_add_device() · d377e85b
      由 Greg Kroah-Hartman 提交于 
      Don't error out if something "bad" happens when trying to bind a driver to a
device.  We want the sysfs attributes to be present for later when we try to
tear down the device.
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      d377e85b
    • S
      [PATCH] USB: fix hid core to return proper error code from probe · 479f6ea8
      由 Stelian Pop 提交于 
      Drivers need to return -ENODEV when they can't bind to a device.
Anything else stops the "bind a device to a driver" search.

From: Stelian Pop <stelian@popies.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      479f6ea8
    • N
      [LTPC]: Replace schedule_timeout() with ssleep()/msleep() · 2c4ee8f9
      由 Nishanth Aravamudan 提交于 
      Use ssleep() / msleep() [as appropriate]
instead of schedule_timeout() to guarantee the task delays as expected.
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Acked-by: NArnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: NMaximilian Attems <janitor@sternwelten.at>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      2c4ee8f9
  3. 22 6月, 2005 36 次提交