[Scst-devel] [PATCH] Make iSCSI-SCST work again without the zero-copy kernel patch

[Bart V. A. <bva...@ac...>]

iscsi_alloc_data_buf() returns the value 1. That is the numerical
representation of SCST_CMD_STATE_PREPARE_SPACE. This causes the
SCST core to keep invoking iscsi_alloc_data_buf() in an infinite
loop. Change the return value into SCST_CMD_STATE_DEFAULT such
that the iSCSI-SCST driver works again without the zero-copy
kernel patch.

Signed-off-by: Bart Van Assche <bva...@ac...>

diff --git a/iscsi-scst/kernel/iscsi.c b/iscsi-scst/kernel/iscsi.c
index 6b6e09e..9e5dd04 100644
--- a/iscsi-scst/kernel/iscsi.c
+++ b/iscsi-scst/kernel/iscsi.c
@@ -3154,7 +3154,7 @@ static int iscsi_alloc_data_buf(struct scst_cmd *cmd)
        */
       EXTRACHECKS_BUG_ON(!(scst_cmd_get_data_direction(cmd) & SCST_DATA_READ));
       scst_cmd_set_no_sgv(cmd);
-       return 1;
+       return SCST_CMD_STATE_DEFAULT;
 }
 #endif