diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-27 10:19:32 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-27 10:19:32 +0300 |
commit | e47ff590cc57a3468c1f77e5f2494bbaefdd4371 (patch) | |
tree | 7c71b3832c0d805b0ee6daa1aaaa50326b65654f /drivers/char/hw_random/geode-rng.c | |
parent | 2e58cafa0bbde529a9f44300382f60f6ce46d7d2 (diff) | |
parent | c02ed2e75ef4c74e41e421acb4ef1494671585e8 (diff) | |
download | linux-e47ff590cc57a3468c1f77e5f2494bbaefdd4371.tar.xz |
Merge 4.11-rc4 into usb-next
This resolves a merge issue in the gadget code, and we want the USB
fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/hw_random/geode-rng.c')
-rw-r--r-- | drivers/char/hw_random/geode-rng.c | 50 |
1 files changed, 35 insertions, 15 deletions
diff --git a/drivers/char/hw_random/geode-rng.c b/drivers/char/hw_random/geode-rng.c index e7a245942029..e1d421a36a13 100644 --- a/drivers/char/hw_random/geode-rng.c +++ b/drivers/char/hw_random/geode-rng.c @@ -31,6 +31,9 @@ #include <linux/module.h> #include <linux/pci.h> + +#define PFX KBUILD_MODNAME ": " + #define GEODE_RNG_DATA_REG 0x50 #define GEODE_RNG_STATUS_REG 0x54 @@ -82,6 +85,7 @@ 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; @@ -89,27 +93,43 @@ static int __init mod_init(void) for_each_pci_dev(pdev) { ent = pci_match_id(pci_tbl, pdev); - if (ent) { - rng_base = pci_resource_start(pdev, 0); - if (rng_base == 0) - return -ENODEV; - - mem = devm_ioremap(&pdev->dev, rng_base, 0x58); - if (!mem) - return -ENOMEM; - geode_rng.priv = (unsigned long)mem; - - pr_info("AMD Geode RNG detected\n"); - return devm_hwrng_register(&pdev->dev, &geode_rng); - } + if (ent) + goto found; } - /* Device not found. */ - return -ENODEV; + 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; + } +out: + return err; + +err_unmap: + iounmap(mem); + goto out; } static void __exit mod_exit(void) { + void __iomem *mem = (void __iomem *)geode_rng.priv; + + hwrng_unregister(&geode_rng); + iounmap(mem); } module_init(mod_init); |