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authorTom Lendacky <thomas.lendacky@amd.com>2014-01-06 23:34:29 +0400
committerHerbert Xu <herbert@gondor.apana.org.au>2014-01-15 07:33:40 +0400
commitdb34cf9122319d6fed59bd3ba26fa099a8ece432 (patch)
treed161399362984611892d5f42cbe7f186547b9944 /drivers/crypto
parent82d1585b9a9d5106ec6a630696f3e2e532fc3cba (diff)
downloadlinux-db34cf9122319d6fed59bd3ba26fa099a8ece432.tar.xz
crypto: ccp - CCP device enabled/disabled changes
The CCP cannot be hot-plugged so it will either be there or it won't. Do not allow the driver to stay loaded if the CCP does not successfully initialize. Provide stub routines in the ccp.h file that return -ENODEV if the CCP has not been configured in the build. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/ccp/ccp-dev.c15
-rw-r--r--drivers/crypto/ccp/ccp-pci.c3
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index b2038a7e91e1..c3bc21264600 100644
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -552,6 +552,7 @@ static const struct x86_cpu_id ccp_support[] = {
static int __init ccp_mod_init(void)
{
struct cpuinfo_x86 *cpuinfo = &boot_cpu_data;
+ int ret;
if (!x86_match_cpu(ccp_support))
return -ENODEV;
@@ -560,7 +561,19 @@ static int __init ccp_mod_init(void)
case 22:
if ((cpuinfo->x86_model < 48) || (cpuinfo->x86_model > 63))
return -ENODEV;
- return ccp_pci_init();
+
+ ret = ccp_pci_init();
+ if (ret)
+ return ret;
+
+ /* Don't leave the driver loaded if init failed */
+ if (!ccp_get_device()) {
+ ccp_pci_exit();
+ return -ENODEV;
+ }
+
+ return 0;
+
break;
}
diff --git a/drivers/crypto/ccp/ccp-pci.c b/drivers/crypto/ccp/ccp-pci.c
index f08c16d370cd..93319f9db753 100644
--- a/drivers/crypto/ccp/ccp-pci.c
+++ b/drivers/crypto/ccp/ccp-pci.c
@@ -267,6 +267,9 @@ static void ccp_pci_remove(struct pci_dev *pdev)
struct device *dev = &pdev->dev;
struct ccp_device *ccp = dev_get_drvdata(dev);
+ if (!ccp)
+ return;
+
ccp_destroy(ccp);
pci_iounmap(pdev, ccp->io_map);