diff options
| -rw-r--r-- | drivers/char/hw_random/geode-rng.c | 50 |
1 files changed, 15 insertions, 35 deletions
diff --git a/drivers/char/hw_random/geode-rng.c b/drivers/char/hw_random/geode-rng.c index 0d0579fe465e..79e7482dc5c4 100644 --- a/drivers/char/hw_random/geode-rng.c +++ b/drivers/char/hw_random/geode-rng.c @@ -31,9 +31,6 @@ #include <linux/delay.h> #include <asm/io.h> - -#define PFX KBUILD_MODNAME ": " - #define GEODE_RNG_DATA_REG 0x50 #define GEODE_RNG_STATUS_REG 0x54 @@ -85,7 +82,6 @@ static struct hwrng geode_rng = { static int __init mod_init(void) { - int err = -ENODEV; struct pci_dev *pdev = NULL; const struct pci_device_id *ent; void __iomem *mem; @@ -93,43 +89,27 @@ static int __init mod_init(void) for_each_pci_dev(pdev) { ent = pci_match_id(pci_tbl, pdev); - if (ent) - goto found; - } - /* Device not found. */ - goto out; - -found: - rng_base = pci_resource_start(pdev, 0); - if (rng_base == 0) - goto out; - err = -ENOMEM; - mem = ioremap(rng_base, 0x58); - if (!mem) - goto out; - geode_rng.priv = (unsigned long)mem; - - pr_info("AMD Geode RNG detected\n"); - err = hwrng_register(&geode_rng); - if (err) { - pr_err(PFX "RNG registering failed (%d)\n", - err); - goto err_unmap; + if (ent) { + rng_base = pci_resource_start(pdev, 0); + if (rng_base == 0) + return -ENODEV; + + mem = devm_ioremap(&pdev->dev, rng_base, 0x58); + if (IS_ERR(mem)) + return PTR_ERR(mem); + geode_rng.priv = (unsigned long)mem; + + pr_info("AMD Geode RNG detected\n"); + return devm_hwrng_register(&pdev->dev, &geode_rng); + } } -out: - return err; -err_unmap: - iounmap(mem); - goto out; + /* Device not found. */ + return -ENODEV; } static void __exit mod_exit(void) { - void __iomem *mem = (void __iomem *)geode_rng.priv; - - hwrng_unregister(&geode_rng); - iounmap(mem); } module_init(mod_init); |