From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Subject: [patch 2/2] qlcnic: using too much stack Date: Mon, 9 Aug 2010 12:37:27 +0200 Message-ID: <20100809103727.GH9031@bicker> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Anirban Chakraborty , linux-driver@qlogic.com, "David S. Miller" , Sucheta Chakraborty , netdev@vger.kernel.org, kernel-janitors@vger.kernel.org To: Amit Kumar Salecha Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:40151 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756092Ab0HIKjh (ORCPT ); Mon, 9 Aug 2010 06:39:37 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: qlcnic_pci_info structs are 128 bytes so an array of 8 uses 1024 bytes. That's a lot if you run with 4K stacks. I allocated them with kcalloc() instead. Signed-off-by: Dan Carpenter diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c index 7f27e2a..da84229 100644 --- a/drivers/net/qlcnic/qlcnic_main.c +++ b/drivers/net/qlcnic/qlcnic_main.c @@ -473,14 +473,20 @@ qlcnic_cleanup_pci_map(struct qlcnic_adapter *adapter) static int qlcnic_init_pci_info(struct qlcnic_adapter *adapter) { - struct qlcnic_pci_info pci_info[QLCNIC_MAX_PCI_FUNC]; + struct qlcnic_pci_info *pci_info; int i, ret = 0, err; u8 pfn; + pci_info = kcalloc(QLCNIC_MAX_PCI_FUNC, sizeof(*pci_info), GFP_KERNEL); + if (!pci_info) + return -ENOMEM; + adapter->npars = kzalloc(sizeof(struct qlcnic_npar_info) * QLCNIC_MAX_PCI_FUNC, GFP_KERNEL); - if (!adapter->npars) - return -ENOMEM; + if (!adapter->npars) { + err = -ENOMEM; + goto err_pci_info; + } adapter->eswitch = kzalloc(sizeof(struct qlcnic_eswitch) * QLCNIC_NIU_MAX_XG_PORTS, GFP_KERNEL); @@ -508,6 +514,7 @@ qlcnic_init_pci_info(struct qlcnic_adapter *adapter) for (i = 0; i < QLCNIC_NIU_MAX_XG_PORTS; i++) adapter->eswitch[i].flags |= QLCNIC_SWITCH_ENABLE; + kfree(pci_info); return 0; err_eswitch: @@ -516,6 +523,8 @@ err_eswitch: err_npars: kfree(adapter->npars); adapter->eswitch = NULL; +err_pci_info: + kfree(pci_info); return ret; } @@ -3362,15 +3371,21 @@ qlcnic_sysfs_read_pci_config(struct file *file, struct kobject *kobj, struct device *dev = container_of(kobj, struct device, kobj); struct qlcnic_adapter *adapter = dev_get_drvdata(dev); struct qlcnic_pci_func_cfg pci_cfg[QLCNIC_MAX_PCI_FUNC]; - struct qlcnic_pci_info pci_info[QLCNIC_MAX_PCI_FUNC]; + struct qlcnic_pci_info *pci_info; int i, ret; if (size != sizeof(pci_cfg)) return QL_STATUS_INVALID_PARAM; + pci_info = kcalloc(QLCNIC_MAX_PCI_FUNC, sizeof(*pci_info), GFP_KERNEL); + if (!pci_info) + return -ENOMEM; + ret = qlcnic_get_pci_info(adapter, pci_info); - if (ret) + if (ret) { + kfree(pci_info); return ret; + } for (i = 0; i < QLCNIC_MAX_PCI_FUNC ; i++) { pci_cfg[i].pci_func = pci_info[i].id; @@ -3381,8 +3396,8 @@ qlcnic_sysfs_read_pci_config(struct file *file, struct kobject *kobj, memcpy(&pci_cfg[i].def_mac_addr, &pci_info[i].mac, ETH_ALEN); } memcpy(buf, &pci_cfg, size); + kfree(pci_info); return size; - } static struct bin_attribute bin_attr_npar_config = { .attr = {.name = "npar_config", .mode = (S_IRUGO | S_IWUSR)},