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powerpc/powernv: only register log if OPAL supports doing so 

Correct use of REGISTER/UNREGISTER is to check if the token exists
before calling. If we don't we get a "OPAL: Called with bad token 101 !"
error, which is harmless but may be alarming to some.

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Acked-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Stewart Smith 2015-02-12 16:25:27 +11:00 committed by Michael Ellerman
parent df99e6eb3f
commit b962f5a446
1 changed files with 5 additions and 1 deletions
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6
arch/powerpc/platforms/powernv/opal.c
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@ -665,6 +665,9 @@ static void __init opal_dump_region_init(void)
uint64_t size;
int rc;
if (!opal_check_token(OPAL_REGISTER_DUMP_REGION))
return;
/* Register kernel log buffer */
addr = log_buf_addr_get();
if (addr == NULL)
@ -823,7 +826,8 @@ void opal_shutdown(void)
}
/* Unregister memory dump region */
opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF);
if (opal_check_token(OPAL_UNREGISTER_DUMP_REGION))
opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF);
}
/* Export this so that test modules can use it */