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authorHerbert Xu <herbert@gondor.apana.org.au>2007-10-19 09:37:58 +0400
committerDavid S. Miller <davem@davemloft.net>2007-10-19 09:37:58 +0400
commitce0e32e65f70337e0732c97499b643205fa8ea31 (patch)
tree3f3a4a48210a1e4208a8ed5507f2e3269a7b79da /net/mac80211
parenta25de534f89c515c82d3553c42d3bb02c2d1a7da (diff)
downloadlinux-ce0e32e65f70337e0732c97499b643205fa8ea31.tar.xz
[NET]: Fix possible dev_deactivate race condition
The function dev_deactivate is supposed to only return when all outstanding transmissions have completed. Unfortunately it is possible for store operations in the driver's transmit function to only become visible after dev_deactivate returns. This patch fixes this by taking the queue lock after we see the end of the queue run. This ensures that all effects of any previous transmit calls are visible. If however we detect that there is another queue run occuring, then we'll warn about it because this should never happen as we have pointed dev->qdisc to noop_qdisc within the same queue lock earlier in the functino. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac80211')
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