diff options
| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2011-04-27 23:21:15 +0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-05-04 09:13:15 +0400 |
| commit | bd68ccb390f0d91e26e6f3252ba457ee4e06974a (patch) | |
| tree | a66d7a020af3596dc2f066a99f2fe9936dbb57d5 /drivers/char/hw_random/amd-rng.c | |
| parent | 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f (diff) | |
| download | linux-bd68ccb390f0d91e26e6f3252ba457ee4e06974a.tar.xz | |
hwrng: amd - manage resource allocation
As amd driver doesn't bind to PCI device, we'd better manage reource
allocation on our own to disallow (possible) conflicts.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random/amd-rng.c')
| -rw-r--r-- | drivers/char/hw_random/amd-rng.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/char/hw_random/amd-rng.c b/drivers/char/hw_random/amd-rng.c index 0d8c5788b8e4..c6af038682f1 100644 --- a/drivers/char/hw_random/amd-rng.c +++ b/drivers/char/hw_random/amd-rng.c @@ -133,6 +133,12 @@ found: pmbase &= 0x0000FF00; if (pmbase == 0) goto out; + if (!request_region(pmbase + 0xF0, 8, "AMD HWRNG")) { + dev_err(&pdev->dev, "AMD HWRNG region 0x%x already in use!\n", + pmbase + 0xF0); + err = -EBUSY; + goto out; + } amd_rng.priv = (unsigned long)pmbase; amd_pdev = pdev; @@ -141,6 +147,7 @@ found: if (err) { printk(KERN_ERR PFX "RNG registering failed (%d)\n", err); + release_region(pmbase + 0xF0, 8); goto out; } out: @@ -149,6 +156,8 @@ out: static void __exit mod_exit(void) { + u32 pmbase = (unsigned long)amd_rng.priv; + release_region(pmbase + 0xF0, 8); hwrng_unregister(&amd_rng); } |