pcmuio_detach() is called by the comedi core even if pcmuio_attach()
returned an error, so `dev->private` might be `NULL`. Check for that
before dereferencing it.
Also, as pointed out by Dan Carpenter, there is no need to check the
pointer passed to `kfree()` is non-NULL, so remove that check.
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/staging/comedi/drivers/pcmuio.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index f942455..67e2bb1 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -672,12 +672,13 @@ static void pcmuio_detach(struct comedi_device *dev)
struct pcmuio_private *devpriv = dev->private;
int i;
- for (i = 0; i < PCMUIO_MAX_ASICS; ++i) {
- if (devpriv->asics[i].irq)
- free_irq(devpriv->asics[i].irq, dev);
- }
- if (devpriv && devpriv->sprivs)
+ if (devpriv) {
+ for (i = 0; i < PCMUIO_MAX_ASICS; ++i) {
+ if (devpriv->asics[i].irq)
+ free_irq(devpriv->asics[i].irq, dev);
+ }
kfree(devpriv->sprivs);
+ }
comedi_legacy_detach(dev);
}
--
1.8.3.2
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
