Re: [PATCH] block: fix unintended fallthrough in generic_make_request_checks()

Nicolai Stange [off-list ref] writes:

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Applicable to next-20161202.

Note that after this patch, I'm seeing a single
 EXT4-fs (dm-1): Delayed block allocation failed for inode 2625094 at
                 logical offset 2032 with max blocks 2 with error 121
with 121 == EREMOTEIO

This is because my SATA sda reports 0x20 (invalid command) back
in response to 0x41 (WRITE_SAME).

After this has happened, sd_done() disables "write same" once and for
all, hence only this single message.

I expect this to get fixed by
  https://patchwork.kernel.org/patch/9321963/

Just FYI: Not really, the (supposedly) corresponding commit has already
been in linux-next when I was testing: commit 0ce1b18c42a5 ("libata:
Some drives failing on SCT Write Same").

I sent separate patch for this issue:
http://lkml.kernel.org/r/20161205235638.11539-1-nicstange@gmail.com

Regards,

Nicolai