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| author | Ian Abbott <abbotti@mev.co.uk> | 2021-02-23 17:30:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 18:34:34 +0300 |
| commit | d46b4b8f208bcb550380e6c508bf972f56b070c2 (patch) | |
| tree | c3b7b84bd8c7a2f7df8211c0548e1b323e9699ca /drivers | |
| parent | e3755505e12e2307db86873442ec8ee488bfc564 (diff) | |
| download | linux-d46b4b8f208bcb550380e6c508bf972f56b070c2.tar.xz | |
staging: comedi: me4000: Fix endian problem for AI command data
commit b39dfcced399d31e7c4b7341693b18e01c8f655e upstream.
The analog input subdevice supports Comedi asynchronous commands that
use Comedi's 16-bit sample format. However, the calls to
`comedi_buf_write_samples()` are passing the address of a 32-bit integer
variable. On bigendian machines, this will copy 2 bytes from the wrong
end of the 32-bit value. Fix it by changing the type of the variable
holding the sample value to `unsigned short`.
Fixes: de88924f67d1 ("staging: comedi: me4000: use comedi_buf_write_samples()")
Cc: <stable@vger.kernel.org> # 3.19+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20210223143055.257402-8-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/comedi/drivers/me4000.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index 15a53204a36a..4fe856128870 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -933,7 +933,7 @@ static irqreturn_t me4000_ai_isr(int irq, void *dev_id) struct comedi_subdevice *s = dev->read_subdev; int i; int c = 0; - unsigned int lval; + unsigned short lval; if (!dev->attached) return IRQ_NONE; |