[Bug 219652] READ CAPACITY(16) not used on large USB-attached drive in recent kernels

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219652

--- Comment #10 from Alan Stern (stern@rowland.harvard.edu) ---
Re comment #8: I would like to know the answers to the questions asked in
comment #4 about the bad kernel:

   In sd_read_capacity(), does sd_try_rc16_first() return true?

   And why doesn't the "Very big device. Trying to use READ CAPACITY(16)" line,
along with the subsequent call to read_capacity_16(), get executed in the bad
kernel?

   Or does read_capacity_16() get executed but return immediately with an error
instead of communicating with the device?

The whole business about 0xffffffff vs. 0xfffffffe is a red herring.  If the
bad kernel were working properly, the issue wouldn't even arise.  Notice that
you never see the erroneous value under the good kernel.

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