[PATCH 8/9] mtip32xx: don't use req->special

[Christoph Hellwig]

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 <h...@lst.de>
---
 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 5ae86224b2f5..e99db2c9118f 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 63414928f07c..c33f8c3d9fb4 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. */
 
-- 
2.19.1