Commit 07b8dae3 authored by Andy Grover's avatar Andy Grover Committed by Nicholas Bellinger
Browse files

target: Don't allow setting WC emulation if device doesn't support

Just like for pSCSI, if the transport sets get_write_cache, then it is
not valid to enable write cache emulation for it. Return an error.

see https://bugzilla.redhat.com/show_bug.cgi?id=1082675

Reviewed-by: default avatarChris Leech <cleech@redhat.com>
Signed-off-by: default avatarAndy Grover <agrover@redhat.com>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 52d0aa79
......@@ -798,10 +798,10 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
pr_err("emulate_write_cache not supported for pSCSI\n");
return -EINVAL;
}
if (dev->transport->get_write_cache) {
pr_warn("emulate_write_cache cannot be changed when underlying"
" HW reports WriteCacheEnabled, ignoring request\n");
return 0;
if (flag &&
dev->transport->get_write_cache) {
pr_err("emulate_write_cache not supported for this device\n");
return -EINVAL;
}
dev->dev_attrib.emulate_write_cache = flag;
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment