As the number of arguments to sg_common_write() starts to grow (more in later patches) add a structure to hold most of these arguments. Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> --- drivers/scsi/sg.c | 47 ++++++++++++++++++++++++++++++++--------------- 1 file changed, 32 insertions(+), 15 deletions(-) diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index fcf3b9ed5126..90188afa6ff2 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -179,6 +179,13 @@ struct sg_device { /* holds the state of each scsi generic device */ struct kref d_ref; }; +struct sg_comm_wr_t { /* arguments to sg_common_write() */ + int timeout; + int blocking; + struct sg_request *srp; + u8 *cmnd; +}; + /* tasklet or soft irq callback */ static void sg_rq_end_io(struct request *rq, blk_status_t status); /* Declarations of other static functions used before they are defined */ @@ -191,8 +198,7 @@ static ssize_t sg_submit(struct sg_fd *sfp, struct file *filp, const char __user *buf, size_t count, bool blocking, bool read_only, bool sg_io_owned, struct sg_request **o_srp); -static int sg_common_write(struct sg_fd *sfp, struct sg_request *srp, - u8 *cmnd, int timeout, int blocking); +static int sg_common_write(struct sg_fd *sfp, struct sg_comm_wr_t *cwp); static int sg_read_append(struct sg_request *srp, void __user *outp, int num_xfer); static void sg_remove_scat(struct sg_fd *sfp, struct sg_scatter_hold *schp); @@ -487,6 +493,7 @@ sg_write(struct file *filp, const char __user *p, size_t count, loff_t *ppos) struct sg_io_hdr v3hdr; struct sg_header *ohp = &ov2hdr; struct sg_io_hdr *h3p = &v3hdr; + struct sg_comm_wr_t cwr; u8 cmnd[SG_MAX_CDB_SIZE]; res = sg_check_file_access(filp, __func__); @@ -590,7 +597,11 @@ sg_write(struct file *filp, const char __user *p, size_t count, loff_t *ppos) input_size, (unsigned int) cmnd[0], current->comm); } - res = sg_common_write(sfp, srp, cmnd, sfp->timeout, blocking); + cwr.timeout = sfp->timeout; + cwr.blocking = blocking; + cwr.srp = srp; + cwr.cmnd = cmnd; + res = sg_common_write(sfp, &cwr); return (res < 0) ? res : count; } @@ -615,6 +626,7 @@ sg_submit(struct sg_fd *sfp, struct file *filp, const char __user *buf, int k; struct sg_request *srp; struct sg_io_hdr *hp; + struct sg_comm_wr_t cwr; u8 cmnd[SG_MAX_CDB_SIZE]; int timeout; unsigned long ul_timeout; @@ -665,23 +677,28 @@ sg_submit(struct sg_fd *sfp, struct file *filp, const char __user *buf, sg_remove_request(sfp, srp); return -EPERM; } - k = sg_common_write(sfp, srp, cmnd, timeout, blocking); + cwr.timeout = timeout; + cwr.blocking = blocking; + cwr.srp = srp; + cwr.cmnd = cmnd; + k = sg_common_write(sfp, &cwr); if (k < 0) return k; if (o_srp) - *o_srp = srp; + *o_srp = cwr.srp; return count; } static int -sg_common_write(struct sg_fd *sfp, struct sg_request *srp, - u8 *cmnd, int timeout, int blocking) +sg_common_write(struct sg_fd *sfp, struct sg_comm_wr_t *cwrp) { - int k, at_head; + bool at_head; + int k; struct sg_device *sdp = sfp->parentdp; + struct sg_request *srp = cwrp->srp; struct sg_io_hdr *hp = &srp->header; - srp->data.cmd_opcode = cmnd[0]; /* hold opcode of command */ + srp->data.cmd_opcode = cwrp->cmnd[0]; /* hold opcode of command */ hp->status = 0; hp->masked_status = 0; hp->msg_status = 0; @@ -690,14 +707,14 @@ sg_common_write(struct sg_fd *sfp, struct sg_request *srp, hp->driver_status = 0; hp->resid = 0; SG_LOG(4, sfp, "%s: opcode=0x%02x, cmd_sz=%d\n", __func__, - (int)cmnd[0], hp->cmd_len); + (int)cwrp->cmnd[0], hp->cmd_len); if (hp->dxfer_len >= SZ_256M) { sg_remove_request(sfp, srp); return -EINVAL; } - k = sg_start_req(srp, cmnd); + k = sg_start_req(srp, cwrp->cmnd); if (k) { SG_LOG(1, sfp, "%s: start_req err=%d\n", __func__, k); sg_finish_scsi_blk_rq(srp); @@ -718,13 +735,13 @@ sg_common_write(struct sg_fd *sfp, struct sg_request *srp, hp->duration = jiffies_to_msecs(jiffies); if (hp->interface_id != '\0' && /* v3 (or later) interface */ (SG_FLAG_Q_AT_TAIL & hp->flags)) - at_head = 0; + at_head = false; else - at_head = 1; + at_head = true; - if (!blocking) + if (!srp->sg_io_owned) atomic_inc(&sfp->submitted); - srp->rq->timeout = timeout; + srp->rq->timeout = cwrp->timeout; kref_get(&sfp->f_ref); /* sg_rq_end_io() does kref_put(). */ blk_execute_rq_nowait(srp->rq, at_head, sg_rq_end_io); return 0; -- 2.25.1