diff mbox

[2/2,v2] qlcnic: using too much stack

Message ID 20100810074936.GG18431@bicker
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Dan Carpenter Aug. 10, 2010, 7:49 a.m. UTC 
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 <error27@gmail.com>
---
V2:  No change.  I had to respin because of the 1/1 patch.

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Comments

David Miller Aug. 10, 2010, 8:34 a.m. UTC | #1 
From: Dan Carpenter <error27@gmail.com>
Date: Tue, 10 Aug 2010 09:49:36 +0200

> 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 <error27@gmail.com>

Applied.
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diff mbox

Patch

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 6b8df55..bf6d87a 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->npars = 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)},