s390/qdio: fix truncated debug output of hex values

Calling debug_event the s390 debug feature only logs up to buf_size
bytes of the debug view. If debug_event is called with more bytes
than buf_size the additional data is ignored and not logged in the
debug view.

Use multiple calls to debug_event if the length exceeds buf_size.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 25 insertions, 13 deletions

diff --git a/drivers/s390/cio/qdio_debug.h b/drivers/s390/cio/qdio_debug.h
index e1f646800dd..7f8b973da29 100644
--- a/drivers/s390/cio/qdio_debug.h
+++ b/drivers/s390/cio/qdio_debug.h
@@ -37,10 +37,14 @@ static inline int qdio_dbf_passes(debug_info_t *dbf_grp, int level)
 		debug_text_event(qdio_dbf_setup, DBF_ERR, debug_buffer); \
 	} while (0)
 
-#define DBF_HEX(addr, len) \
-	do { \
-		debug_event(qdio_dbf_setup, DBF_ERR, (void*)(addr), len); \
-	} while (0)
+static inline void DBF_HEX(void *addr, int len)
+{
+	while (len > 0) {
+		debug_event(qdio_dbf_setup, DBF_ERR, addr, len);
+		len -= qdio_dbf_setup->buf_size;
+		addr += qdio_dbf_setup->buf_size;
+	}
+}
 
 #define DBF_ERROR(text...) \
 	do { \
@@ -49,11 +53,14 @@ static inline int qdio_dbf_passes(debug_info_t *dbf_grp, int level)
 		debug_text_event(qdio_dbf_error, DBF_ERR, debug_buffer); \
 	} while (0)
 
-#define DBF_ERROR_HEX(addr, len) \
-	do { \
-		debug_event(qdio_dbf_error, DBF_ERR, (void*)(addr), len); \
-	} while (0)
-
+static inline void DBF_ERROR_HEX(void *addr, int len)
+{
+	while (len > 0) {
+		debug_event(qdio_dbf_error, DBF_ERR, addr, len);
+		len -= qdio_dbf_error->buf_size;
+		addr += qdio_dbf_error->buf_size;
+	}
+}
 
 #define DBF_DEV_EVENT(level, device, text...) \
 	do { \
@@ -64,10 +71,15 @@ static inline int qdio_dbf_passes(debug_info_t *dbf_grp, int level)
 		} \
 	} while (0)
 
-#define DBF_DEV_HEX(level, device, addr, len) \
-	do { \
-		debug_event(device->debug_area, level, (void*)(addr), len); \
-	} while (0)
+static inline void DBF_DEV_HEX(struct qdio_irq *dev, void *addr,
+			       int len, int level)
+{
+	while (len > 0) {
+		debug_event(dev->debug_area, level, addr, len);
+		len -= dev->debug_area->buf_size;
+		addr += dev->debug_area->buf_size;
+	}
+}
 
 void qdio_allocate_dbf(struct qdio_initialize *init_data,
 		       struct qdio_irq *irq_ptr);