From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:44971 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755651AbcILRGd (ORCPT ); Mon, 12 Sep 2016 13:06:33 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexander Duyck , Bruce Allan , Krishneil Singh , Jeff Kirsher , Sasha Levin Subject: [PATCH 4.4 025/192] [PATCH 025/135] fm10k: Cleanup exception handling for mailbox interrupt Date: Mon, 12 Sep 2016 18:58:54 +0200 Message-Id: <20160912152159.955563306@linuxfoundation.org> In-Reply-To: <20160912152158.855601725@linuxfoundation.org> References: <20160912152158.855601725@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit e00e23bceba48a8f0c94fefe26948404cbd43d0a ] This patch addresses two issues. First is the fact that the fm10k_mbx_free_irq was assuming msix_entries was valid and that will not always be the case. As such we need to add a check for if it is NULL. Second is the fact that we weren't freeing the IRQ if the mailbox API returned an error on trying to connect. Signed-off-by: Alexander Duyck Reviewed-by: Bruce Allan Tested-by: Krishneil Singh Signed-off-by: Jeff Kirsher Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -1122,6 +1122,10 @@ void fm10k_mbx_free_irq(struct fm10k_int struct fm10k_hw *hw = &interface->hw; int itr_reg; + /* no mailbox IRQ to free if MSI-X is not enabled */ + if (!interface->msix_entries) + return; + /* disconnect the mailbox */ hw->mbx.ops.disconnect(hw, &hw->mbx); @@ -1444,10 +1448,15 @@ int fm10k_mbx_request_irq(struct fm10k_i err = fm10k_mbx_request_irq_pf(interface); else err = fm10k_mbx_request_irq_vf(interface); + if (err) + return err; /* connect mailbox */ - if (!err) - err = hw->mbx.ops.connect(hw, &hw->mbx); + err = hw->mbx.ops.connect(hw, &hw->mbx); + + /* if the mailbox failed to connect, then free IRQ */ + if (err) + fm10k_mbx_free_irq(interface); return err; }