diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 19:47:45 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 16:49:38 +0300 |
| commit | 408bece94e7bdba3b420f1bf4607a2d2dbab1faf (patch) | |
| tree | cccdccb958d1e9081a5580963722ca090a178cb2 | |
| parent | 4ede1d2e697bef66d068058bbe3ff5d9c392b56b (diff) | |
| download | linux-408bece94e7bdba3b420f1bf4607a2d2dbab1faf.tar.xz | |
comedi: dt2811: Add sanity checks for I/O base address
The "dt2811" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a supported
board in the DT2811 family. It currently allows any base address to be
configured but the hardware only supports base addresses (configured by
on-board jumpers) 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/20260130170416.49994-21-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/comedi/drivers/dt2811.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/dt2811.c b/drivers/comedi/drivers/dt2811.c index dbb9f38da289..bcc4b5ef48e8 100644 --- a/drivers/comedi/drivers/dt2811.c +++ b/drivers/comedi/drivers/dt2811.c @@ -556,7 +556,8 @@ static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it) if (!devpriv) return -ENOMEM; - ret = comedi_request_region(dev, it->options[0], 0x8); + ret = comedi_check_request_region(dev, it->options[0], 0x8, + 0x200, 0x3ff, 8); if (ret) return ret; |