Author: nwhitehorn
Date: Mon Sep 9 12:45:41 2013
New Revision: 255416
URL: http://svnweb.freebsd.org/changeset/base/255416
Log:
Use a spin lock instead of a mutex to gate RTAS. This is required if RTAS
calls are involved in interrupt handling.
Approved by: re (kib)
Modified:
head/sys/powerpc/ofw/rtas.c
Modified: head/sys/powerpc/ofw/rtas.c
==============================================================================
--- head/sys/powerpc/ofw/rtas.c Mon Sep 9 12:44:48 2013 (r255415)
+++ head/sys/powerpc/ofw/rtas.c Mon Sep 9 12:45:41 2013 (r255416)
@@ -93,7 +93,7 @@ rtas_setup(void *junk)
return;
}
- mtx_init(&rtas_mtx, "RTAS", MTX_DEF, 0);
+ mtx_init(&rtas_mtx, "RTAS", NULL, MTX_SPIN);
/* RTAS must be called with everything turned off in MSR */
rtasmsr = mfmsr();
@@ -208,7 +208,7 @@ rtas_call_method(cell_t token, int nargs
args.token = token;
va_start(ap, nreturns);
- mtx_lock(&rtas_mtx);
+ mtx_lock_spin(&rtas_mtx);
rtas_bounce_offset = 0;
args.nargs = nargs;
@@ -232,7 +232,7 @@ rtas_call_method(cell_t token, int nargs
__asm __volatile ("sync");
rtas_real_unmap(argsptr, &args, sizeof(args));
- mtx_unlock(&rtas_mtx);
+ mtx_unlock_spin(&rtas_mtx);
if (result < 0)
return (result);
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