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sunhme: Return an ERR_PTR from quattro_pci_find

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In order to differentiate between a missing bridge and an OOM condition,
return ERR_PTRs from quattro_pci_find. This also does some general linting
in the area.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Sean Anderson 2022-09-23 21:53:30 -04:00 committed by Jakub Kicinski
parent acb3f35f92
commit d6f1e89bdb
1 changed files with 27 additions and 22 deletions
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49
drivers/net/ethernet/sun/sunhme.c
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@ -2498,18 +2498,16 @@ static struct quattro *quattro_sbus_find(struct platform_device *child)
return qp;
qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
if (qp != NULL) {
int i;
if (!qp)
return NULL;
for (i = 0; i < 4; i++)
qp->happy_meals[i] = NULL;
memset(qp->happy_meals, 0, sizeof(*qp->happy_meals));
qp->quattro_dev = child;
qp->next = qfe_sbus_list;
qfe_sbus_list = qp;
qp->quattro_dev = child;
qp->next = qfe_sbus_list;
qfe_sbus_list = qp;
platform_set_drvdata(op, qp);
}
platform_set_drvdata(op, qp);
return qp;
}
@ -2569,30 +2567,33 @@ static void quattro_sbus_free_irqs(void)
#ifdef CONFIG_PCI
static struct quattro *quattro_pci_find(struct pci_dev *pdev)
{
int i;
struct pci_dev *bdev = pdev->bus->self;
struct quattro *qp;
if (!bdev) return NULL;
if (!bdev)
return ERR_PTR(-ENODEV);
for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
struct pci_dev *qpdev = qp->quattro_dev;
if (qpdev == bdev)
return qp;
}
qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
if (qp != NULL) {
int i;
if (!qp)
return ERR_PTR(-ENOMEM);
for (i = 0; i < 4; i++)
qp->happy_meals[i] = NULL;
for (i = 0; i < 4; i++)
qp->happy_meals[i] = NULL;
qp->quattro_dev = bdev;
qp->next = qfe_pci_list;
qfe_pci_list = qp;
qp->quattro_dev = bdev;
qp->next = qfe_pci_list;
qfe_pci_list = qp;
/* No range tricks necessary on PCI. */
qp->nranges = 0;
}
/* No range tricks necessary on PCI. */
qp->nranges = 0;
return qp;
}
#endif /* CONFIG_PCI */
@ -2948,11 +2949,15 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
qp = quattro_pci_find(pdev);
if (qp == NULL)
if (IS_ERR(qp)) {
err = PTR_ERR(qp);
goto err_out;
}
for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
if (qp->happy_meals[qfe_slot] == NULL)
if (!qp->happy_meals[qfe_slot])
break;
if (qfe_slot == 4)
goto err_out;
}