it821x: fix kzalloc() failure handling
Allocate 'struct it821x_dev' objects for both ports in it821x_init_one().
Fixes potential OOPS in it821x_quirkproc() (uses 'itdev' unconditionally)
and other problems ('itdev' is needed for correct operation of the driver).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c
index b9f9e0d..a38ec47 100644
--- a/drivers/ide/pci/it821x.c
+++ b/drivers/ide/pci/it821x.c
@@ -523,16 +523,12 @@
static void __devinit init_hwif_it821x(ide_hwif_t *hwif)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
- struct it821x_dev *idev = kzalloc(sizeof(struct it821x_dev), GFP_KERNEL);
+ struct it821x_dev **itdevs = (struct it821x_dev **)pci_get_drvdata(dev);
+ struct it821x_dev *idev = itdevs[hwif->channel];
u8 conf;
hwif->quirkproc = &it821x_quirkproc;
- if (idev == NULL) {
- printk(KERN_ERR "it821x: out of memory, falling back to legacy behaviour.\n");
- return;
- }
-
ide_set_hwifdata(hwif, idev);
pci_read_config_byte(dev, 0x50, &conf);
@@ -641,6 +637,22 @@
static int __devinit it821x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
+ struct it821x_dev *itdevs[2] = { NULL, NULL} , *itdev;
+ unsigned int i;
+
+ for (i = 0; i < 2; i++) {
+ itdev = kzalloc(sizeof(*itdev), GFP_KERNEL);
+ if (itdev == NULL) {
+ kfree(itdevs[0]);
+ printk(KERN_ERR "it821x: out of memory\n");
+ return -ENOMEM;
+ }
+
+ itdevs[i] = itdev;
+ }
+
+ pci_set_drvdata(dev, itdevs);
+
return ide_setup_pci_device(dev, &it821x_chipsets[id->driver_data]);
}