[PATCH v2] usb: gadget: udc: remove pointer dereference after free

[Gustavo A. R. Silva]

Remove pointer dereference after free and set pointer to NULL after free.

Addresses-Coverity-ID: 1091173
Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
---
Changes in v2:
 Move pointer dereference before pci_pool_free()
 Set pointer to NULL after free

 drivers/usb/gadget/udc/pch_udc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/pch_udc.c  
b/drivers/usb/gadget/udc/pch_udc.c
index a97da64..73bb58f 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -1522,8 +1522,9 @@ static void pch_udc_free_dma_chain(struct  
pch_udc_dev *dev,
 		/* do not free first desc., will be done by free for request */
 		td = phys_to_virt(addr);
 		addr2 = (dma_addr_t)td->next;
-		pci_pool_free(dev->data_requests, td, addr);
 		td->next = 0x00;
+		pci_pool_free(dev->data_requests, td, addr);
+		td = NULL;
 		addr = addr2;
 	}
 	req->chain_len = 1;
--
2.5.0