qlcnic: using too much stack

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 6 deletions

diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 6b8df55840c..bf6d87adda4 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)},