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scst_parse_unmap_descriptors(): Avoid using GFP_KERNEL in atomic context

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Reported-by: Shahar Salzman <shahar.salzman@kaminario.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5964 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2015-01-13 08:51:08 +00:00
parent 87fb2237c0
commit efff5e2a20
1 changed files with 10 additions and 2 deletions
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12
scst/src/scst_targ.c
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@@ -1734,8 +1734,16 @@ static int scst_tgt_pre_exec(struct scst_cmd *cmd)
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;
}