diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 16:47:37 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 15:49:37 +0200 |
| commit | 9a27a33cd9b80a7304637356e8a5a9c5b846734f (patch) | |
| tree | 9e2b103931bc78f87ab7994a283184dd988e8a0d /drivers | |
| parent | 2750aecdf60524a7d58ecdaaa6e9728ad008cadb (diff) | |
comedi: das08_isa: Add sanity checks for I/O base address
The "das08_isa" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a supported
board in the DAS08 family. 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 0 to 0x3f0 on 16-byte boundaries.
(Technically, the DIP switches allow 8-byte boundaries, but I do not
think that is advisable given that the boards decode an 16-byte address
range.)
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/20260130170416.49994-13-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/comedi/drivers/das08_isa.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/das08_isa.c b/drivers/comedi/drivers/das08_isa.c index 3d43b77cc9f4..1b022dc10b78 100644 --- a/drivers/comedi/drivers/das08_isa.c +++ b/drivers/comedi/drivers/das08_isa.c @@ -167,7 +167,8 @@ static int das08_isa_attach(struct comedi_device *dev, if (!devpriv) return -ENOMEM; - ret = comedi_request_region(dev, it->options[0], board->iosize); + ret = comedi_check_request_region(dev, it->options[0], board->iosize, + 0, 0x3ff, board->iosize); if (ret) return ret; |