hw/dma/i8257: Silence phony error message

Convert into trace event. Otherwise the message
	dma: unregistered DMA channel used nchan=0 dma_pos=0 dma_len=1
gets printed every time and fills up the log-file with 50 MiB / minute.
Signed-off-by: NPhilipp Hahn <hahn@univention.de>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/dma/i8257.c

@@ -24,6 +24,7 @@
 #include "hw/hw.h"
 #include "hw/isa/isa.h"
 #include "qemu/main-loop.h"
+#include "trace.h"
 
 /* #define DEBUG_DMA */
 
@@ -473,8 +474,7 @@ static void dma_reset(void *opaque)
 
 static int dma_phony_handler (void *opaque, int nchan, int dma_pos, int dma_len)
 {
-    dolog ("unregistered DMA channel used nchan=%d dma_pos=%d dma_len=%d\n",
-           nchan, dma_pos, dma_len);
+    trace_i8257_unregistered_dma(nchan, dma_pos, dma_len);
     return dma_pos;
 }
 

trace-events

@@ -1318,3 +1318,6 @@ mhp_pc_dimm_assigned_address(uint64_t addr) "0x%"PRIx64
 # target-s390x/kvm.c
 kvm_enable_cmma(int rc) "CMMA: enabling with result code %d"
 kvm_clear_cmma(int rc) "CMMA: clearing with result code %d"
+
+# hw/dma/i8257.c
+i8257_unregistered_dma(int nchan, int dma_pos, int dma_len) "unregistered DMA channel used nchan=%d dma_pos=%d dma_len=%d"