From: Toshiaki Makita Date: Mon, 13 Apr 2015 09:15:10 +0000 (+0900) Subject: igb: Fix oops on changing number of rings X-Git-Tag: omap-for-v4.2/wakeirq-drivers~2^2~30^2~16^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0a06ee185f2b785c7bd44c4fb6fcae80f7d1a54;p=pandora-kernel.git igb: Fix oops on changing number of rings When changing the number of rings by ethtool -L, q_vectors are reused, which causes oops because of uninitialized pointers. - When an rx is reused as a tx, q_vector->rx.ring is not set to NULL, which misleads igb_poll() to determine that it has an rx ring although it actually points to the tx ring. - When a tx is reused as an rx, q_vector->rx.ring->skb (q_vector->ring[0].skb) has a value that was used as tx_stats before. Fix these problems by zeroing it out on reuseing it. Fixes: 02ef6e1d0b00 ("igb: Fix queue allocation method to accommodate changing during runtime") Signed-off-by: Toshiaki Makita Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- Reading git-diff-tree failed