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path: root/drivers/staging/comedi/drivers/amplc_pc263.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/amplc_pc263.c')
-rw-r--r--drivers/staging/comedi/drivers/amplc_pc263.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/amplc_pc263.c b/drivers/staging/comedi/drivers/amplc_pc263.c
index 60830ccfb903..d0a4c441228b 100644
--- a/drivers/staging/comedi/drivers/amplc_pc263.c
+++ b/drivers/staging/comedi/drivers/amplc_pc263.c
@@ -323,6 +323,8 @@ static void pc263_detach(struct comedi_device *dev)
{
const struct pc263_board *thisboard = comedi_board(dev);
+ if (!thisboard)
+ return;
if (is_isa_board(thisboard)) {
if (dev->iobase)
release_region(dev->iobase, PC263_IO_SIZE);