comedi: ni_at_a2150: Fix sanity check in interrupt handler

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The driver requests an interrupt handler for the device before it is
fully set up.

For safety, the interrupt handler checks the dev->attached flag to
ensure the device is fully set up, but it currently does that after
dereferencing various pointers which may be NULL if dev->attached is
false.  Move the check to avoid the possible null pointer dereferences.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://patch.msgid.link/20260618102949.26607-5-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ian Abbott 2026-06-18 11:09:11 +01:00 • committed by Greg Kroah-Hartman

parent 8dda638257

commit e7356cdc70

1 changed files with 9 additions and 4 deletions

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drivers/comedi/drivers/ni_at_a2150.c

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