linux-toradex.git/drivers/block/null_blk.c, branch v4.12

blk-mq: remove the error argument to blk_mq_complete_request

2017-04-20T18:16:10+00:00

Now that all drivers that call blk_mq_complete_requests have a
->complete callback we can remove the direct call to blk_mq_end_request,
as well as the error argument to blk_mq_complete_request.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Reviewed-by: Bart Van Assche 
Signed-off-by: Jens Axboe

null_blk: don't pass always-0 req->errors to blk_mq_complete_request

2017-04-20T18:16:10+00:00

Signed-off-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Jens Axboe

null_blk: Use blk_init_request_from_bio() instead of open-coding it

2017-04-19T23:38:31+00:00

This patch changes the behavior of the null_blk driver for the
LightNVM mode as follows:
* REQ_FAILFAST_MASK is set for read-ahead requests.
* If no I/O priority has been set in the bio, the I/O priority is
  copied from the I/O context.
* The rq_disk member is initialized if bio->bi_bdev != NULL.
* req->errors is initialized to zero.

Signed-off-by: Bart Van Assche 
Reviewed-by: Christoph Hellwig 
Cc: Matias Bjørling 
Cc: Adam Manzanares 
Signed-off-by: Jens Axboe

blk-mq: constify struct blk_mq_ops

2017-03-31T14:28:58+00:00

Constify all instances of blk_mq_ops, as they are never modified.

Signed-off-by: Eric Biggers 
Signed-off-by: Jens Axboe

null_blk: add blocking mode

2017-03-30T19:44:26+00:00

This adds a new module parameter to null_blk, blocking. If set, null_blk
will set the BLK_MQ_F_BLOCKING flag, indicating that it sometimes/always
needs to block in its ->queue_rq() function.  The intent is to help find
regressions in blocking drivers, since not many of them exist.

If null_blk is loaded with submit_queues > 1 and blocking=1, this
shows the regression recently fixed by bf4907c05e61.

Reviewed-by: Bart Van Assche 
Signed-off-by: Jens Axboe

Merge branch 'for-4.11/next' into for-4.11/linus-merge

2017-02-17T21:08:19+00:00

Signed-off-by: Jens Axboe

block: fold cmd_type into the REQ_OP_ space

2017-01-31T21:00:44+00:00

Instead of keeping two levels of indirection for requests types, fold it
all into the operations.  The little caveat here is that previously
cmd_type only applied to struct request, while the request and bio op
fields were set to plain REQ_OP_READ/WRITE even for passthrough
operations.

Instead this patch adds new REQ_OP_* for SCSI passthrough and driver
private requests, althought it has to add two for each so that we
can communicate the data in/out nature of the request.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

lightnvm: use end_io callback instead of instance

2017-01-31T15:32:13+00:00

When the lightnvm core had the "gennvm" layer between the device and the
target, there was a need for the core to be able to figure out which
target it should send an end_io callback to. Leading to a "double"
end_io, first for the media manager instance, and then for the target
instance. Now that core and gennvm is merged, there is no longer a need
for this, and a single end_io callback will do.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

lightnvm: reduce number of nvm_id groups to one

2017-01-31T15:32:13+00:00

The number of configuration groups has been limited to one in current
code, even if there is support for up to four. With the introduction
of the open-channel SSD 1.3 specification, only a single
group is exposed onwards. Reflect this in the nvm_id structure.

Signed-off-by: Matias Bjørling 
Signed-off-by: Jens Axboe

ktime: Cleanup ktime_set() usage

2016-12-25T16:21:22+00:00

ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra