On Sat, Feb 11 2017, Gustavo A. R. Silva wrote: > 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> Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx> > --- > 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; Or just drop this. pci_pool_free doesn’t care about contents of td. It’s just a void* for it. > + pci_pool_free(dev->data_requests, td, addr); > + td = NULL; This isn’t necessary either. td will get overwritten on next iteration and once we’re done it’s not used again. > addr = addr2; > } > req->chain_len = 1; -- Best regards ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ «If at first you don’t succeed, give up skydiving» -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
