linux-toradex.git/drivers/iio/industrialio-buffer.c, branch v3.12.2

iio:buffer: Free active scan mask in iio_disable_all_buffers()

2013-10-15T18:26:43+00:00

Usually the active scan mask is freed in __iio_update_buffers() when the buffer
is disabled. But when the device is still sampling when it is removed we'll end
up disabling the buffers in iio_disable_all_buffers(). So we also need to free
the active scan mask here, otherwise it will be leaked.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Stop sampling when the device is removed

2013-09-21T11:36:30+00:00

Make sure to stop sampling when the device is removed, otherwise it will
continue to sample forever.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Fix crash when scan_bytes is computed with active_scan_mask == NULL

2013-09-21T11:30:58+00:00

if device has available_scan_masks set and the buffer is enabled without
any scan_elements enabled, in a NULL pointer is dereferenced in iio_compute_scan_bytes()

[   18.993713] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[   19.002593] pgd = debd4000
[   19.005432] [00000000] *pgd=9ebc0831, *pte=00000000, *ppte=00000000
[   19.012329] Internal error: Oops: 17 [#1] PREEMPT ARM
[   19.017639] Modules linked in:
[   19.020843] CPU: 0    Not tainted  (3.9.11-00036-g75c888a-dirty #207)
[   19.027587] PC is at _find_first_bit_le+0xc/0x2c
[   19.032440] LR is at iio_compute_scan_bytes+0x2c/0xf4
[   19.037719] pc : []    lr : []    psr: 200d0013
[   19.037719] sp : debd9ed0  ip : 00000000  fp : 000802bc
[   19.049713] r10: 00000000  r9 : 00000000  r8 : deb67250
[   19.055206] r7 : 00000000  r6 : 00000000  r5 : 00000000  r4 : deb67000
[   19.062011] r3 : de96ec00  r2 : 00000000  r1 : 00000004  r0 : 00000000
[   19.068847] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   19.076324] Control: 10c5387d  Table: 9ebd4019  DAC: 00000015

problem is the rollback code in iio_update_buffers(), old_mask may be NULL (e.g. on first
call)

I'm not too confident about the fix; works for me...

Signed-off-by: Peter Meerwald 
Reviewed-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: buffer: cleanup messages in iio_update_buffers()

2013-05-22T21:16:47+00:00

1. make messages grepable (in one line)
2. include returned errno in them

Signed-off-by: Michał Mirosław 
Signed-off-by: Jonathan Cameron

staging:iio: Add support for multiple buffers

2012-11-10T10:17:21+00:00

Route all buffer writes through the demux.
Addition or removal of a buffer results in tear down and
setup of all the buffers for a given device.

Signed-off-by: Jonathan Cameron 
Tested-by: srinivas pandruvada

iio: Use strict_strtouint instead of kstrtoul

2012-10-19T17:46:50+00:00

strict_strto* has been deprecated in favor of kstrto*. Use strict_strtouint
respective strict_strtoint, since that is what the functions we pass the
converted values to expect.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: Drop timestamp parameter from buffer store_to callback

2012-09-08T09:14:34+00:00

Drop timestamp parameter from buffer store_to callback and subsequently from
iio_push_to_buffer. The timestamp parameter is unused and it seems likely that
it will stay unused in the future, so it should be safe to remove it.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron

iio: whitespace cleanup and removal of semicolon after functions

2012-09-03T19:26:43+00:00

Signed-off-by: Peter Meerwald 
Signed-off-by: Jonathan Cameron

Merge tag 'togreg-3.6a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

2012-07-12T19:29:44+00:00

IIO: One new driver and a couple of nice cleanups.

iio: Introduce iio_validate_scan_mask_onehot

2012-07-09T17:18:15+00:00

Add a helper function for validating a scan mask for devices where exactly one
channel must be selected during sampling. This is a common case among devices
which have scan mask restrictions so it makes sense to provide this function in
the core.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Jonathan Cameron