From ce70fd9a551af7424a7dace2a1ba05a7de8eae27 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 24 Feb 2022 18:55:47 +0100 Subject: scsi: core: Remove the cmd field from struct scsi_request Now that each scsi_request is backed by a scsi_cmnd, there is no need to indirect the CDB storage. Change all submitters of SCSI passthrough requests to store the CDB information directly in the scsi_cmnd, and while doing so allocate the full 32 bytes that cover all Linux supported SCSI hosts instead of requiring dynamic allocation for > 16 byte CDBs. On 64-bit systems this does not change the size of the scsi_cmnd at all, while on 32-bit systems it slightly increases it for now, but that increase will be made up by the removal of the remaining scsi_request fields. Link: https://lore.kernel.org/r/20220224175552.988286-4-hch@lst.de Reviewed-by: Bart Van Assche Reviewed-by: John Garry Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/block/pktcdvd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 2b6b70a39e76..42c284b2d7f9 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -693,6 +693,7 @@ static void pkt_rbtree_insert(struct pktcdvd_device *pd, struct pkt_rb_node *nod static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc) { struct request_queue *q = bdev_get_queue(pd->bdev); + struct scsi_cmnd *scmd; struct request *rq; int ret = 0; @@ -700,6 +701,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command * REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); if (IS_ERR(rq)) return PTR_ERR(rq); + scmd = blk_mq_rq_to_pdu(rq); if (cgc->buflen) { ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen, @@ -708,8 +710,8 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command * goto out; } - scsi_req(rq)->cmd_len = COMMAND_SIZE(cgc->cmd[0]); - memcpy(scsi_req(rq)->cmd, cgc->cmd, CDROM_PACKET_SIZE); + scmd->cmd_len = COMMAND_SIZE(cgc->cmd[0]); + memcpy(scmd->cmnd, cgc->cmd, CDROM_PACKET_SIZE); rq->timeout = 60*HZ; if (cgc->quiet) -- cgit v1.2.3