Jul 06 2014

thunderbolt: Correct the size argument to devm_kzalloc 

Author: Himangi Saraogi <himangi774@gmail.com>

nhi->rx_rings does not have type as struct tb_ring *, as it is a
double pointer so the elements of the array should have pointer type,
not structure type.

The Coccinelle semantic patch that makes this change is as follows:

// 
@disable sizeof_type_expr@
type T;
T **x;
@@

  x =
  <+...sizeof(
- T
+ *x
  )...+>
// 

Signed-off-by: Himangi Saraogi 
Acked-by: Julia Lawall 
Cc: Andreas Noever 
Signed-off-by: Greg Kroah-Hartman 

---
 drivers/thunderbolt/nhi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 2054fbf..ce72f31 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -570,10 +570,10 @@ static int nhi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	INIT_WORK(&nhi->interrupt_work, nhi_interrupt_work);
 
 	nhi->tx_rings = devm_kzalloc(&pdev->dev,
-				     nhi->hop_count * sizeof(struct tb_ring),
+				     nhi->hop_count * sizeof(*nhi->tx_rings),
 				     GFP_KERNEL);
 	nhi->rx_rings = devm_kzalloc(&pdev->dev,
-				     nhi->hop_count * sizeof(struct tb_ring),
+				     nhi->hop_count * sizeof(*nhi->rx_rings),
 				     GFP_KERNEL);
 	if (!nhi->tx_rings || !nhi->rx_rings)
 		return -ENOMEM;

qlambert