diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 19:48:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 16:49:40 +0300 |
| commit | 0ca9f8150ce5a41a3b4bb65f043f0335e7ef67b5 (patch) | |
| tree | b8fa345cdcc938eef8202f85ace34dc6c2762bc5 | |
| parent | ddd5b28744322f9434ab71661a1280f5069983fd (diff) | |
| download | linux-0ca9f8150ce5a41a3b4bb65f043f0335e7ef67b5.tar.xz | |
comedi: pcmad: Add sanity checks for I/O base address
The "pcmad" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a
PCM-A/D-12 or PCM-A/D-16 board. It currently allows any base address to
be configured but the hardware only supports base addresses (configured
by on-board jumpers) in the range 0 to 0x3FC on 4-byte boundaries.
Add a sanity check to ensure the device is not configured at an
unsupported base address.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://patch.msgid.link/20260130170416.49994-41-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/comedi/drivers/pcmad.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/pcmad.c b/drivers/comedi/drivers/pcmad.c index 976eda43881b..fd26b1eed1db 100644 --- a/drivers/comedi/drivers/pcmad.c +++ b/drivers/comedi/drivers/pcmad.c @@ -106,7 +106,8 @@ static int pcmad_attach(struct comedi_device *dev, struct comedi_devconfig *it) struct comedi_subdevice *s; int ret; - ret = comedi_request_region(dev, it->options[0], 0x04); + ret = comedi_check_request_region(dev, it->options[0], 0x04, + 0, 0x3ff, 4); if (ret) return ret; |