Author: Julia Lawall <julia@diku.dk>
Use kmemdup when some other buffer is immediately copied into the
allocated region.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
//
@@
expression from,to,size,flag;
statement S;
@@
- to = \(kmalloc\|kzalloc\)(size,flag);
+ to = kmemdup(from,size,flag);
if (to==NULL || ...) S
- memcpy(to, from, size);
//
Signed-off-by: Julia Lawall
Signed-off-by: John W. Linville
---
drivers/net/wireless/libertas_tf/if_usb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/libertas_tf/if_usb.c b/drivers/net/wireless/libertas_tf/if_usb.c
index c445500..b172f5d 100644
--- a/drivers/net/wireless/libertas_tf/if_usb.c
+++ b/drivers/net/wireless/libertas_tf/if_usb.c
@@ -538,7 +538,8 @@ static void if_usb_receive_fwload(struct urb *urb)
return;
}
- syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
+ syncfwheader = kmemdup(skb->data, sizeof(struct fwsyncheader),
+ GFP_ATOMIC);
if (!syncfwheader) {
lbtf_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
kfree_skb(skb);
@@ -546,8 +547,6 @@ static void if_usb_receive_fwload(struct urb *urb)
return;
}
- memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
-
if (!syncfwheader->cmd) {
lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n", |
---
drivers/net/wireless/libertas_tf/if_usb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/libertas_tf/if_usb.c b/drivers/net/wireless/libertas_tf/if_usb.c
index c445500..b172f5d 100644
--- a/drivers/net/wireless/libertas_tf/if_usb.c
+++ b/drivers/net/wireless/libertas_tf/if_usb.c
@@ -538,7 +538,8 @@ static void if_usb_receive_fwload(struct urb *urb)
return;
}
- syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
+ syncfwheader = kmemdup(skb->data, sizeof(struct fwsyncheader),
+ GFP_ATOMIC);
if (!syncfwheader) {
lbtf_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
kfree_skb(skb);
@@ -546,8 +547,6 @@ static void if_usb_receive_fwload(struct urb *urb)
return;
}
- memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
-
if (!syncfwheader->cmd) {
lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",