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it821x: fix kzalloc() failure handling

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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-26 17:36:42 +02:00
parent 79472b6ea9
commit eb7a07e8d6
1 changed files with 18 additions and 6 deletions
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24
drivers/ide/pci/it821x.c
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@ -523,16 +523,12 @@ static void __devinit it821x_quirkproc(ide_drive_t *drive)
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 const struct ide_port_info it821x_chipsets[] __devinitdata = {
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]);
}