staging/iio: Use correct argument for sizeof

Author: Peter Huewe <peterhuewe@gmx.de>

found with coccicheck
sizeof when applied to a pointer typed expression gives the size of
the pointer

The semantic patch that makes this output is available
in scripts/coccinelle/misc/noderef.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/

Signed-off-by: Peter Huewe 
Signed-off-by: Jonathan Cameron 
---
 drivers/staging/iio/iio_hwmon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/staging/iio/iio_hwmon.c b/drivers/staging/iio/iio_hwmon.c
index c7a5f97..97ad645 100644
--- a/drivers/staging/iio/iio_hwmon.c
+++ b/drivers/staging/iio/iio_hwmon.c
@@ -93,7 +93,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
 	while (st->channels[st->num_channels].indio_dev)
 		st->num_channels++;
 
-	st->attrs = kzalloc(sizeof(st->attrs) * (st->num_channels + 1),
+	st->attrs = kzalloc(sizeof(*st->attrs) * (st->num_channels + 1),
 			    GFP_KERNEL);
 	if (st->attrs == NULL) {
 		ret = -ENOMEM;