linux-toradex.git/drivers/scsi/device_handler/scsi_dh_emc.c, branch v4.9.131

scsi: scsi_dh_emc: return success in clariion_std_inquiry()

2017-10-21T15:21:36+00:00

[ Upstream commit 4d7d39a18b8b81511f0b893b7d2203790bf8a58b ]

We accidentally return an uninitialized variable on success.

Fixes: b6ff1b14cdf4 ("[SCSI] scsi_dh: Update EMC handler")
Signed-off-by: Dan Carpenter 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

scsi_dh_emc: update 'access_state' field

2016-03-05T22:20:33+00:00

Update the 'access_state' field of the SCSI device whenever the path
state changes.

Signed-off-by: Hannes Reinecke 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Johannes Thumshirn 
Signed-off-by: Martin K. Petersen

scsi_dh: kill struct scsi_dh_data

2015-08-28T20:14:57+00:00

Add a ->handler and a ->handler_data field to struct scsi_device and kill
this indirection.  Also move struct scsi_device_handler to scsi_dh.h so that
changes to it don't require rebuilding every SCSI LLDD.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Signed-off-by: James Bottomley

scsi_dh: move device matching to the core code

2015-08-28T20:14:56+00:00

Add a single list of devices that need non-ALUA device handlers to the core
scsi_dh code so that we can autoload the modules for them at probe time.

While this is a little ugly in terms of architecture it actually
significantly simplifies the code in addition to the new autoloading
functionality.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Reviewed-by: Hannes Reinecke 
Acked-by: Mike Snitzer 
Signed-off-by: James Bottomley

scsi: handle more device handler setup/teardown in common code

2014-11-12T10:19:36+00:00

Move all code to set up and tear down sdev->scsi_dh_data to common code.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Mike Christie 
Reviewed-by: Hannes Reinecke

scsi: remove struct scsi_dh_devlist

2014-11-12T10:19:29+00:00

All drivers now do their own matching, so there is no more need to expose
a device list as part of the interface.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Mike Christie 
Reviewed-by: Hannes Reinecke

scsi: use container_of to get at device handler private data

2014-11-12T10:19:25+00:00

Signed-off-by: Christoph Hellwig 
Reviewed-by: Mike Christie 
Reviewed-by: Hannes Reinecke

scsi_dh: get module reference outside of device handler

2014-11-12T10:19:22+00:00

We need to grab a reference to the module before calling the attach
routines to avoid a small race vs module removal.  It also cleans up
the code significantly as a side effect.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Mike Christie 
Reviewed-by: Hannes Reinecke

block,scsi: fixup blk_get_request dead queue scenarios

2014-08-28T16:03:46+00:00

The blk_get_request function may fail in low-memory conditions or during
device removal (even if __GFP_WAIT is set). To distinguish between these
errors, modify the blk_get_request call stack to return the appropriate
ERR_PTR. Verify that all callers check the return status and consider
IS_ERR instead of a simple NULL pointer check.

For consistency, make a similar change to the blk_mq_alloc_request leg
of blk_get_request.  It may fail if the queue is dead, or the caller was
unwilling to wait.

Signed-off-by: Joe Lawrence 
Acked-by: Jiri Kosina  [for pktdvd]
Acked-by: Boaz Harrosh  [for osd]
Reviewed-by: Jeff Moyer 
Signed-off-by: Jens Axboe

block: add blk_rq_set_block_pc()

2014-06-06T13:57:37+00:00

With the optimizations around not clearing the full request at alloc
time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC
up to the user allocating the request.

Add a blk_rq_set_block_pc() that sets the command type to
REQ_TYPE_BLOCK_PC, and properly initializes the members associated
with this type of request. Update callers to use this function instead
of manipulating rq->cmd_type directly.

Includes fixes from Christoph Hellwig  for my half-assed
attempt.

Signed-off-by: Jens Axboe