[Scst-svn] SF.net SVN: scst:[5964] trunk/scst/src/scst_targ.c

[<bva...@us...>]

Revision: 5964
          http://sourceforge.net/p/scst/svn/5964
Author:   bvassche
Date:     2015-01-13 08:51:08 +0000 (Tue, 13 Jan 2015)
Log Message:
-----------
scst_parse_unmap_descriptors(): Avoid using GFP_KERNEL in atomic context

Reported-by: Shahar Salzman <sha...@ka...>
Signed-off-by: Bart Van Assche <bva...@ac...>

Modified Paths:
--------------
    trunk/scst/src/scst_targ.c

Modified: trunk/scst/src/scst_targ.c
===================================================================
--- trunk/scst/src/scst_targ.c	2015-01-13 08:42:28 UTC (rev 5963)
+++ trunk/scst/src/scst_targ.c	2015-01-13 08:51:08 UTC (rev 5964)
@@ -1734,9 +1734,17 @@
 
 out_descr:
 	if (unlikely(cmd->op_flags & SCST_DESCRIPTORS_BASED)) {
-		int r = scst_parse_descriptors(cmd);
-		if (unlikely(r != 0))
+		if (scst_cmd_atomic(cmd)) {
+			/*
+			 * Switch to thread context such that
+			 * scst_parse_descriptors() can use GFP_KERNEL instead
+			 * of GFP_ATOMIC.
+			 */
+			res = SCST_CMD_STATE_RES_NEED_THREAD;
 			goto out;
+		}
+		if (unlikely(scst_parse_descriptors(cmd) != 0))
+			goto out;
 	}
 
 out:

This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.