diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 19:47:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 16:49:37 +0300 |
| commit | 2750aecdf60524a7d58ecdaaa6e9728ad008cadb (patch) | |
| tree | 8763eb87eba567ffc0d0924ba41254d9a5596d40 | |
| parent | 118fb051de0129e0565880119dd7fe64b233f969 (diff) | |
| download | linux-2750aecdf60524a7d58ecdaaa6e9728ad008cadb.tar.xz | |
comedi: dac02: Add sanity checks for I/O base address
The "dac02" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a supported
DAC-02 board. It currently allows any base address to be configured but
the hardware only supports base addresses (configured by an on-board DIP
switch) in the range 0x200 to 0x3f8 on 8-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/20260130170416.49994-12-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/comedi/drivers/dac02.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/dac02.c b/drivers/comedi/drivers/dac02.c index 4b011d66d7b0..2c04472c5078 100644 --- a/drivers/comedi/drivers/dac02.c +++ b/drivers/comedi/drivers/dac02.c @@ -103,7 +103,8 @@ static int dac02_attach(struct comedi_device *dev, struct comedi_devconfig *it) struct comedi_subdevice *s; int ret; - ret = comedi_request_region(dev, it->options[0], 0x08); + ret = comedi_check_request_region(dev, it->options[0], 0x08, + 0x200, 0x3ff, 8); if (ret) return ret; |