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target: Allow userspace to write 1 to attrib/emulate_fua_write

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Before 4.0, reading attrib/emulate_fua_write has returned 1. Saved
configs created on a pre-4.0 kernel will try to write that back when
restoring LIO configuration. This should succeed with no effect,
and issue a warning.

See https://bugzilla.redhat.com/show_bug.cgi?id=1206184

Reported-by: Yanko Kaneti <yaneti@declera.com>
Reported-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover 2015-03-31 15:04:37 -07:00 • committed by Nicholas Bellinger
parent 9bc6548f37
commit 86d65dc4fe
1 changed files with 2 additions and 2 deletions
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4
drivers/target/target_core_device.c
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@ -781,8 +781,8 @@ int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
} }
if (flag && if (flag &&
dev->transport->get_write_cache) { dev->transport->get_write_cache) {
pr_err("emulate_fua_write not supported for this device\n"); pr_warn("emulate_fua_write not supported for this device, ignoring\n");
return -EINVAL; return 0;
} }
if (dev->export_count) { if (dev->export_count) {
pr_err("emulate_fua_write cannot be changed with active" pr_err("emulate_fua_write cannot be changed with active"