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Date: Mon, 12 Jun 2017 17:23:33 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Ganesh Goudar <ganeshgr@...lsio.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 4.11 006/150] cxgb4: avoid enabling napi twice to the same queue 4.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ganesh Goudar <ganeshgr@...lsio.com> [ Upstream commit e7519f9926f1d0d11c776eb0475eb098c7760f68 ] Take uld mutex to avoid race between cxgb_up() and cxgb4_register_uld() to enable napi for the same uld queue. Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -2217,10 +2217,14 @@ static int cxgb_up(struct adapter *adap) if (err) goto irq_err; } + + mutex_lock(&uld_mutex); enable_rx(adap); t4_sge_start(adap); t4_intr_enable(adap); adap->flags |= FULL_INIT_DONE; + mutex_unlock(&uld_mutex); + notify_ulds(adap, CXGB4_STATE_UP); #if IS_ENABLED(CONFIG_IPV6) update_clip(adap);
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