firewire: move rcode_string() to core

There is nothing audio-specific about the rcode_string() helper, so move
it from snd-firewire-lib into firewire-core to allow other code to use it.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (fixed sound/firewire/cmp.c)

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index dea2dcc9310d..1c4980c32f90 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -994,6 +994,32 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 }
 EXPORT_SYMBOL(fw_core_handle_response);
 
+/**
+ * fw_rcode_string - convert a firewire result code to an error description
+ * @rcode: the result code
+ */
+const char *fw_rcode_string(int rcode)
+{
+        static const char *const names[] = {
+                [RCODE_COMPLETE]       = "no error",
+                [RCODE_CONFLICT_ERROR] = "conflict error",
+                [RCODE_DATA_ERROR]     = "data error",
+                [RCODE_TYPE_ERROR]     = "type error",
+                [RCODE_ADDRESS_ERROR]  = "address error",
+                [RCODE_SEND_ERROR]     = "send error",
+                [RCODE_CANCELLED]      = "timeout",
+                [RCODE_BUSY]           = "busy",
+                [RCODE_GENERATION]     = "bus reset",
+                [RCODE_NO_ACK]         = "no ack",
+        };
+
+        if ((unsigned int)rcode < ARRAY_SIZE(names) && names[rcode])
+                return names[rcode];
+        else
+                return "unknown";
+}
+EXPORT_SYMBOL(fw_rcode_string);
+
 static const struct fw_address_region topology_map_region =
         { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP,
           .end   = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, };