X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/39236c6e673c41db228275375ab7fdb0f837b292..eee3565979933af707c711411001ba11fe406a3c:/libsyscall/wrappers/getiopolicy_np.c

diff --git a/libsyscall/wrappers/getiopolicy_np.c b/libsyscall/wrappers/getiopolicy_np.c
index 146fdac6d..583321622 100644
--- a/libsyscall/wrappers/getiopolicy_np.c
+++ b/libsyscall/wrappers/getiopolicy_np.c
@@ -22,8 +22,10 @@
  */
 #include <errno.h>
 #include <sys/resource.h>
+#include <mach/port.h>
 
 extern int __iopolicysys(int, struct _iopol_param_t *);
+extern void _pthread_clear_qos_tsd(mach_port_t);
 
 int
 getiopolicy_np(int iotype, int scope)
@@ -58,10 +60,17 @@ setiopolicy_np(int iotype, int scope, int policy)
 {
 	/* kernel validates the indiv values, no need to repeat it */
 	struct _iopol_param_t iop_param;
-	
+
 	iop_param.iop_scope = scope;
 	iop_param.iop_iotype = iotype;
 	iop_param.iop_policy = policy;
 
-	return( __iopolicysys(IOPOL_CMD_SET, &iop_param));
+	int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
+	if (rv == -2) {
+		/* not an actual error but indication that __iopolicysys removed the thread QoS */
+        _pthread_clear_qos_tsd(MACH_PORT_NULL);
+		rv = 0;
+	}
+
+	return rv;
 }