linux-toradex.git/drivers/uio/uio.c, branch v2.6.28.3

saner FASYNC handling on file close

2008-11-01T16:49:46+00:00

As it is, all instances of ->release() for files that have ->fasync()
need to remember to evict file from fasync lists; forgetting that
creates a hole and we actually have a bunch that *does* forget.

So let's keep our lives simple - let __fput() check FASYNC in
file->f_flags and call ->fasync() there if it's been set.  And lose that
crap in ->release() instances - leaving it there is still valid, but we
don't have to bother anymore.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6

2008-10-20T20:42:14+00:00

* 'bkl-removal' of git://git.lwn.net/linux-2.6:
  UIO: BKL removal

UIO: BKL removal

2008-10-16T18:32:26+00:00

Fill in needed locking around idr accesses, then remove the big kernel lock
from the UIO driver.  Since there are no in-tree UIO drivers with open()
methods, no further BKL pushdown is required.

Acked-by: Hans J. Koch 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Jonathan Corbet

UIO: Fix mapping of logical and virtual memory

2008-10-16T16:24:54+00:00

mmap() doesn't work as expected for UIO_MEM_LOGICAL or UIO_MEM_VIRTUAL
mappings. The offset into the memory needs to be added, otherwise
uio_vma_fault always returns the first page only. Note that for UIO
userspace calls mmap() with offset = N * getpagesize() to access
mapping N. This must be compensated when calculating the offset. A
comment was added to explain this since it is not obvious.

Signed-off-by: Andrew G. Harvey 
Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

UIO: Add alignment warnings for uio-mem

2008-10-16T16:24:53+00:00

This patch adds an "offset" attribute for UIO mappings. It shows the
difference between the actual start address of the memory and the start
address of the page.

Signed-off-by: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman

device create: misc: convert device_create_drvdata to device_create

2008-10-16T16:24:43+00:00

Now that device_create() has been audited, rename things back to the
original call to be sane.

Signed-off-by: Greg Kroah-Hartman

UIO: Add write function to allow irq masking

2008-07-22T04:54:55+00:00

Sometimes it is necessary to enable/disable the interrupt of a UIO device
from the userspace part of the driver. With this patch, the UIO kernel driver
can implement an "irqcontrol()" function that does this. Userspace can write
an s32 value to /dev/uioX (usually 0 or 1 to turn the irq off or on). The
UIO core will then call the driver's irqcontrol function.

Signed-off-by: Hans J. Koch 
Acked-by: Uwe Kleine-König 
Acked-by: Magnus Damm 
Signed-off-by: Greg Kroah-Hartman

Merge commit 'v2.6.26' into bkl-removal

2008-07-14T21:29:34+00:00

UIO: cdev lock_kernel() pushdown

2008-06-20T20:05:47+00:00

Signed-off-by: Jonathan Corbet

UIO: fix race in device_create

2008-05-20T20:31:55+00:00

There is a race from when a device is created with device_create() and
then the drvdata is set with a call to dev_set_drvdata() in which a
sysfs file could be open, yet the drvdata will be NULL, causing all
sorts of bad things to happen.

This patch fixes the problem by using the new function,
device_create_drvdata().

Cc: Kay Sievers 
Cc: Hans J. Koch 
Signed-off-by: Greg Kroah-Hartman