[S390] cio: Export chsc_error_from_response().

Make chsc_error_from_response() available to chsc callers outside
of chsc.c (namely qdio) to avoid duplicating error checking code.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 65264a38057d5cba26ba13b80787800b030ee84e..29826fdd47b84e658916241c3897386582d04ac9 100644 (file)
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -27,7 +27,13 @@
 
 static void *sei_page;
 
-static int chsc_error_from_response(int response)
+/**
+ * chsc_error_from_response() - convert a chsc response to an error
+ * @response: chsc response code
+ *
+ * Returns an appropriate Linux error code for @response.
+ */
+int chsc_error_from_response(int response)
 {
        switch (response) {
        case 0x0001:
@@ -45,6 +51,7 @@ static int chsc_error_from_response(int response)
                return -EIO;
        }
 }
+EXPORT_SYMBOL_GPL(chsc_error_from_response);
 
 struct chsc_ssd_area {
        struct chsc_header request;

diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index fb6c4d6c45b44cc68f29b7bd7a8cd7372ef70d6e..ba59bceace987968823330fb74abf048286b96e1 100644 (file)
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -101,4 +101,6 @@ void chsc_chp_online(struct chp_id chpid);
 void chsc_chp_offline(struct chp_id chpid);
 int chsc_get_channel_measurement_chars(struct channel_path *chp);
 
+int chsc_error_from_response(int response);
+
 #endif