ext4: warn when discard request fails other than EOPNOTSUPP
We should warn user then the discard request fails. However we need to exclude -EOPNOTSUPP case since parts of the device might not support it while other parts can. So print the kernel warning when the error != -EOPNOTSUPP is returned from ext4_issue_discard(). We should also handle error cases in batched discard, again excluding EOPNOTSUPP. Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com> Signed-off-by: NLukas Czerner <lczerner@redhat.com> Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
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