Merge branch develop-3.10 into develop-3.10-next

[firefly-linux-kernel-4.4.55.git] / drivers / scsi / libiscsi_tcp.c

diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index e98ae33f1295d5ba68ea70ab8f740f709f830950..552e8a2b6f5f35da246bd06f44fb55fbda5f6ce4 100644 (file)
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -36,6 +36,7 @@
 #include <linux/delay.h>
 #include <linux/kfifo.h>
 #include <linux/scatterlist.h>
+#include <linux/module.h>
 #include <net/tcp.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
@@ -134,7 +135,7 @@ static void iscsi_tcp_segment_map(struct iscsi_segment *segment, int recv)
 
        if (recv) {
                segment->atomic_mapped = true;
-               segment->sg_mapped = kmap_atomic(sg_page(sg), KM_SOFTIRQ0);
+               segment->sg_mapped = kmap_atomic(sg_page(sg));
        } else {
                segment->atomic_mapped = false;
                /* the xmit path can sleep with the page mapped so use kmap */
@@ -148,7 +149,7 @@ void iscsi_tcp_segment_unmap(struct iscsi_segment *segment)
 {
        if (segment->sg_mapped) {
                if (segment->atomic_mapped)
-                       kunmap_atomic(segment->sg_mapped, KM_SOFTIRQ0);
+                       kunmap_atomic(segment->sg_mapped);
                else
                        kunmap(sg_page(segment->sg));
                segment->sg_mapped = NULL;
@@ -1084,7 +1085,8 @@ iscsi_tcp_conn_setup(struct iscsi_cls_session *cls_session, int dd_data_size,
        struct iscsi_cls_conn *cls_conn;
        struct iscsi_tcp_conn *tcp_conn;
 
-       cls_conn = iscsi_conn_setup(cls_session, sizeof(*tcp_conn), conn_idx);
+       cls_conn = iscsi_conn_setup(cls_session,
+                                   sizeof(*tcp_conn) + dd_data_size, conn_idx);
        if (!cls_conn)
                return NULL;
        conn = cls_conn->dd_data;
@@ -1096,22 +1098,13 @@ iscsi_tcp_conn_setup(struct iscsi_cls_session *cls_session, int dd_data_size,
 
        tcp_conn = conn->dd_data;
        tcp_conn->iscsi_conn = conn;
-
-       tcp_conn->dd_data = kzalloc(dd_data_size, GFP_KERNEL);
-       if (!tcp_conn->dd_data) {
-               iscsi_conn_teardown(cls_conn);
-               return NULL;
-       }
+       tcp_conn->dd_data = conn->dd_data + sizeof(*tcp_conn);
        return cls_conn;
 }
 EXPORT_SYMBOL_GPL(iscsi_tcp_conn_setup);
 
 void iscsi_tcp_conn_teardown(struct iscsi_cls_conn *cls_conn)
 {
-       struct iscsi_conn *conn = cls_conn->dd_data;
-       struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
-
-       kfree(tcp_conn->dd_data);
        iscsi_conn_teardown(cls_conn);
 }
 EXPORT_SYMBOL_GPL(iscsi_tcp_conn_teardown);
@@ -1177,6 +1170,24 @@ void iscsi_tcp_r2tpool_free(struct iscsi_session *session)
 }
 EXPORT_SYMBOL_GPL(iscsi_tcp_r2tpool_free);
 
+int iscsi_tcp_set_max_r2t(struct iscsi_conn *conn, char *buf)
+{
+       struct iscsi_session *session = conn->session;
+       unsigned short r2ts = 0;
+
+       sscanf(buf, "%hu", &r2ts);
+       if (session->max_r2t == r2ts)
+               return 0;
+
+       if (!r2ts || !is_power_of_2(r2ts))
+               return -EINVAL;
+
+       session->max_r2t = r2ts;
+       iscsi_tcp_r2tpool_free(session);
+       return iscsi_tcp_r2tpool_alloc(session);
+}
+EXPORT_SYMBOL_GPL(iscsi_tcp_set_max_r2t);
+
 void iscsi_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn,
                              struct iscsi_stats *stats)
 {