There's no net_device stashed in skb->cb, there's a net_device * there. To make it *really* clear, also change the write of the dev pointer into skb->cb from a memcpy() to an assignment.
Fixes: 3fe563249374 ("staging: rtl8192u: r8192U_core.c: Cleaning up ...")
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
It seems abundantly clear that no developers are actually testing
this driver. (And I'm continuing that tradition.) Given that it
has spent 2 years with what appears to be a fatal bug, I think it
may be time to give up and remove it rather than continuing to
'clean up'.
Ben.
drivers/staging/rtl8192u/r8192U_core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/rtl8192u/r8192U_core.c
b/drivers/staging/rtl8192u/r8192U_core.c
index 849a95ef723c..2c780cac7dd0 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -1050,7 +1050,7 @@ static void rtl8192_hard_data_xmit(struct sk_buff *skb,
struct net_device *dev,
spin_lock_irqsave(&priv->tx_lock, flags);
- memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
+ *(struct net_device **)(skb->cb) = dev;
tcb_desc->bTxEnableFwCalcDur = 1;
skb_push(skb, priv->ieee80211->tx_headroom);
ret = rtl8192_tx(dev, skb);
@@ -1100,7 +1100,7 @@ static void rtl8192_tx_isr(struct urb *tx_urb)
if (!skb)
return;
- dev = (struct net_device *)(skb->cb);
+ dev = *(struct net_device **)(skb->cb);
tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
queue_index = tcb_desc->queue_index;
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