From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Lendacky Subject: [PATCH net-next] amd-xgbe: IRQ names require allocated memory Date: Tue, 2 Dec 2014 18:07:18 -0600 Message-ID: <20141203000718.17370.31628.stgit@tlendack-t1.amdoffice.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: David Miller To: Return-path: Received: from mail-bn1on0134.outbound.protection.outlook.com ([157.56.110.134]:1664 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932722AbaLCAHZ (ORCPT ); Tue, 2 Dec 2014 19:07:25 -0500 Sender: netdev-owner@vger.kernel.org List-ID: When requesting an irq, the name passed in must be (part of) allocated memory. The irq name was a local variable and resulted in random characters when listing /proc/interrupts. Add a character field to the xgbe_channel structure to hold the irq name and use that. Signed-off-by: Tom Lendacky --- drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 8 ++++---- drivers/net/ethernet/amd/xgbe/xgbe.h | 1 + 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index 02c104d..bedfdb1 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -1285,7 +1285,6 @@ static int xgbe_open(struct net_device *netdev) struct xgbe_hw_if *hw_if = &pdata->hw_if; struct xgbe_desc_if *desc_if = &pdata->desc_if; struct xgbe_channel *channel = NULL; - char dma_irq_name[IFNAMSIZ + 32]; unsigned int i = 0; int ret; @@ -1341,13 +1340,14 @@ static int xgbe_open(struct net_device *netdev) if (pdata->per_channel_irq) { channel = pdata->channel; for (i = 0; i < pdata->channel_count; i++, channel++) { - snprintf(dma_irq_name, sizeof(dma_irq_name) - 1, + snprintf(channel->dma_irq_name, + sizeof(channel->dma_irq_name) - 1, "%s-TxRx-%u", netdev_name(netdev), channel->queue_index); ret = devm_request_irq(pdata->dev, channel->dma_irq, - xgbe_dma_isr, 0, dma_irq_name, - channel); + xgbe_dma_isr, 0, + channel->dma_irq_name, channel); if (ret) { netdev_alert(netdev, "error requesting irq %d\n", diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h index eb33873..f9ec762 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe.h @@ -400,6 +400,7 @@ struct xgbe_channel { /* Per channel interrupt irq number */ int dma_irq; + char dma_irq_name[IFNAMSIZ + 32]; /* Netdev related settings */ struct napi_struct napi;