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net: ibm: emac: Fix some error handling path in 'emac_probe()'

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If 'irq_of_parse_and_map()' or 'of_address_to_resource()' fail, 'err' is
known to be 0 at this point.
So return -ENODEV instead in the first case and use 'of_iomap()' instead of
the equivalent 'of_address_to_resource()/ioremap()' combinaison in the 2nd
case.

Doing so, the 'rsrc_regs' field of the 'emac_instance struct' becomes
redundant and is removed.

While at it, turn a 'err != 0' test into an equivalent 'err' to be more
consistent.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christophe Jaillet 2017-08-20 06:35:00 +02:00 committed by David S. Miller
parent c3168cabe1
commit 138b57f0f8
2 changed files with 4 additions and 9 deletions
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12
drivers/net/ethernet/ibm/emac/core.c
View File

@ -3032,7 +3032,7 @@ static int emac_probe(struct platform_device *ofdev)
/* Init various config data based on device-tree */
err = emac_init_config(dev);
if (err != 0)
if (err)
goto err_free;
/* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
@ -3040,18 +3040,14 @@ static int emac_probe(struct platform_device *ofdev)
dev->wol_irq = irq_of_parse_and_map(np, 1);
if (!dev->emac_irq) {
printk(KERN_ERR "%pOF: Can't map main interrupt\n", np);
err = -ENODEV;
goto err_free;
}
ndev->irq = dev->emac_irq;
/* Map EMAC regs */
if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
printk(KERN_ERR "%pOF: Can't get registers address\n", np);
goto err_irq_unmap;
}
// TODO : request_mem_region
dev->emacp = ioremap(dev->rsrc_regs.start,
resource_size(&dev->rsrc_regs));
// TODO : platform_get_resource() and devm_ioremap_resource()
dev->emacp = of_iomap(np, 0);
if (dev->emacp == NULL) {
printk(KERN_ERR "%pOF: Can't map device registers!\n", np);
err = -ENOMEM;

1
drivers/net/ethernet/ibm/emac/core.h
View File

@ -167,7 +167,6 @@ struct emac_error_stats {
struct emac_instance {
struct net_device *ndev;
struct resource rsrc_regs;
struct emac_regs __iomem *emacp;
struct platform_device *ofdev;
struct device_node **blist; /* bootlist entry */