** Tags added: originate-from-1800986 stella

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https://bugs.launchpad.net/bugs/1806335

Title:
  Enable new Realtek card reader

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  USB Storage based Realtek card reader doesn't work, because the usb-storage 
module tries to use it in UAS mode instead of using "ums-realtek".

  [Fix]
  Add new IDs to ums-realtek driver.
  In addition to that, we add a new module knob, "enable_mmc=", to 
enable/disable MMC, as vendors may not pay MMC royalties. "enable_mmc" defaults 
to 1.

  [Test]
  After applying the patch, the card reader works, and verified "enable_mmc=" 
can enable/disable MMC support.

  [Regression Potential]
  Minimal. This SRU enables two specific card readers that don't work as UAS, 
the new module knob only introduces new behavior when enable_mmc=0.

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