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>
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index b2038a7..c3bc212 100644
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -552,6 +552,7 @@
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 @@
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;
}