diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2026-01-30 19:47:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 16:49:38 +0300 |
| commit | 46fe103de0af2707381a32974407a562b4f6e85a (patch) | |
| tree | 1184a6d9b797ca5d7405ad44e628dab361936f1f | |
| parent | 2ddb4c5699129d8fc9ce8ae0855f47ca2c6b9509 (diff) | |
| download | linux-46fe103de0af2707381a32974407a562b4f6e85a.tar.xz | |
comedi: das800: Add sanity checks for I/O base address
The "das800" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of a supported
board in the DAS800 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 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/20260130170416.49994-18-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/comedi/drivers/das800.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/comedi/drivers/das800.c b/drivers/comedi/drivers/das800.c index 300775523031..7563f40a4023 100644 --- a/drivers/comedi/drivers/das800.c +++ b/drivers/comedi/drivers/das800.c @@ -655,7 +655,8 @@ static int das800_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, + 0, 0x3ff, 8); if (ret) return ret; |