From d85cb20453bc98da47ab4393a1a05afcafb39a0f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 9 Nov 2018 14:49:01 +0100 Subject: [PATCH] mtip32xx: don't use req->special Instead create add to the icmd into struct mtip_cmd which can be unioned with the scatterlist used for the normal I/O path. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/block/mtip32xx/mtip32xx.c | 5 ++--- drivers/block/mtip32xx/mtip32xx.h | 7 ++++++- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 5ae8622..e99db2c 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -997,8 +997,6 @@ static int mtip_exec_internal_command(struct mtip_port *port, return -EFAULT; } - rq->special = &icmd; - set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); if (fis->command == ATA_CMD_SEC_ERASE_PREP) @@ -1019,6 +1017,7 @@ static int mtip_exec_internal_command(struct mtip_port *port, /* Copy the command to the command table */ int_cmd = blk_mq_rq_to_pdu(rq); + int_cmd->icmd = &icmd; memcpy(int_cmd->command, fis, fis_len*4); rq->timeout = timeout; @@ -3548,8 +3547,8 @@ static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx, struct request *rq) { struct driver_data *dd = hctx->queue->queuedata; - struct mtip_int_cmd *icmd = rq->special; struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); + struct mtip_int_cmd *icmd = cmd->icmd; struct mtip_cmd_hdr *hdr = dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag; struct mtip_cmd_sg *command_sg; diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h index 6341492..c33f8c3 100644 --- a/drivers/block/mtip32xx/mtip32xx.h +++ b/drivers/block/mtip32xx/mtip32xx.h @@ -321,6 +321,8 @@ struct mtip_cmd_sg { }; struct mtip_port; +struct mtip_int_cmd; + /* Structure used to describe a command. */ struct mtip_cmd { void *command; /* ptr to command table entry */ @@ -331,7 +333,10 @@ struct mtip_cmd { int unaligned; /* command is unaligned on 4k boundary */ - struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */ + union { + struct scatterlist sg[MTIP_MAX_SG]; /* Scatter list entries */ + struct mtip_int_cmd *icmd; + }; int retries; /* The number of retries left for this command. */ -- 2.7.4