diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 19:47:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 16:49:38 +0300 |
| commit | 4804bacd9d7bfa56670d4449ef034234384afc93 (patch) | |
| tree | c94de0b232a2f835e3fc67dcb76b38f5c7dd975f | |
| parent | 576067b4c05c3f5470a35be2414f2b421042df3c (diff) | |
| download | linux-4804bacd9d7bfa56670d4449ef034234384afc93.tar.xz | |
comedi: dt2815: Add sanity checks for I/O base address
The "dt2815" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a DT2815
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 0x3fe on 2-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/20260130170416.49994-23-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/comedi/drivers/dt2815.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/dt2815.c b/drivers/comedi/drivers/dt2815.c index 03ba2fd18a21..3fa184451523 100644 --- a/drivers/comedi/drivers/dt2815.c +++ b/drivers/comedi/drivers/dt2815.c @@ -144,7 +144,8 @@ static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it) const struct comedi_lrange *current_range_type, *voltage_range_type; int ret; - ret = comedi_request_region(dev, it->options[0], 0x2); + ret = comedi_check_request_region(dev, it->options[0], 0x2, + 0x200, 0x3ff, 2); if (ret) return ret; |