Missingly recognized ADA_Q_NCQ_TRIM_BROKEN for Crucial M550 MU02

[Tomoaki AOKI]

Hi.

I noticed that my Crucial M550 SSD (firmware MU02) is missingly
recognized as quirk ADA_Q_NCQ_TRIM_BROKEN.
If I understand the source (introduced first at r298002, before
stable/11 branched) correctly, only firmware MU01 should be recognized
so for the SSD model, so I have no idea why. :-(

Below are the related portion of dmesg. stable/11 at r304189, amd64.
(Built with options CAM_IOSCHED_DYNAMIC.)

  ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
  ada0: <Crucial CT1024M550SSD1 MU02> ACS-2 ATA SATA 3.x device
  ada0: Serial Number ************
  ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
  ada0: Command Queueing enabled
  ada0: 976762MB (2000409264 512 byte sectors)
  ada0: quirks=0x2<NCQ_TRIM_BROKEN>
  Steering write from 0 kBps to 300000 kBps

One thing to note: The SSD was shipped with MU01 and updated to MU02
using CD image obtained from Crucial Japan website.

Need Bugzilla ticket although it's not a severe problem (goes safer
side, and easy to workaround via loader.conf)?

-- 
Tomoaki AOKI    <junchoon at dec.sakura.ne.jp>