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skd: Remove SKD_ID_INCR 

The SKD_ID_INCR flag in skd_request_context.id duplicates information
that is already available otherwise, e.g. through the block layer
request state and through skd_request_context.state. Hence remove
the code that manipulates this flag and also the flag itself.
Since skd_isr_completion_posted() only uses the lower bits of
skd_request_context.id as hardware tag, this patch does not change
the behavior of the skd driver. I'm referring to the following code:

    tag = req_id & SKD_ID_SLOT_AND_TABLE_MASK;

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2017-08-25 14:24:14 -07:00 committed by Jens Axboe
parent 4633504c1a
commit f5cb2d5152
1 changed files with 0 additions and 5 deletions
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5
drivers/block/skd_main.c
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@ -89,7 +89,6 @@ MODULE_DESCRIPTION("STEC s1120 PCIe SSD block driver");
sizeof(struct fit_comp_error_info)) * SKD_N_COMPLETION_ENTRY)
/* 5 bits of uniqifier, 0xF800 */
#define SKD_ID_INCR (0x400)
#define SKD_ID_TABLE_MASK (3u << 8u)
#define SKD_ID_RW_REQUEST (0u << 8u)
#define SKD_ID_INTERNAL (1u << 8u)
@ -921,9 +920,7 @@ static void skd_send_internal_skspcl(struct skd_device *skdev,
*/
return;
SKD_ASSERT((skspcl->req.id & SKD_ID_INCR) == 0);
skspcl->req.state = SKD_REQ_STATE_BUSY;
skspcl->req.id += SKD_ID_INCR;
scsi = &skspcl->msg_buf->scsi[0];
scsi->hdr.tag = skspcl->req.id;
@ -1044,7 +1041,6 @@ static void skd_complete_internal(struct skd_device *skdev,
skspcl->req.completion = *skcomp;
skspcl->req.state = SKD_REQ_STATE_IDLE;
skspcl->req.id += SKD_ID_INCR;
status = skspcl->req.completion.status;
@ -1451,7 +1447,6 @@ static void skd_release_skreq(struct skd_device *skdev,
* Reclaim the skd_request_context
*/
skreq->state = SKD_REQ_STATE_IDLE;
skreq->id += SKD_ID_INCR;
}
static int skd_isr_completion_posted(struct skd_device *skdev,