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cam: Remove all the write-only variables

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Delete all the write only variables in CAM. At worst, the only behavior
change would be to prevent core dumps from chasing NULL pointers (though
I think in all these cases the pointers can't be NULL).

Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2021-11-23 21:14:05 -07:00
parent 09f1ead230
commit 6637b74600
8 changed files with 1 additions and 42 deletions
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7
sys/cam/nvme/nvme_da.c
View file

@ -375,10 +375,8 @@ ndaioctl(struct disk *dp, u_long cmd, void *data, int fflag,
struct thread *td)
{
struct cam_periph *periph;
struct nda_softc *softc;
periph = (struct cam_periph *)dp->d_drv1;
softc = (struct nda_softc *)periph->softc;
switch (cmd) {
case NVME_IO_TEST:
@ -1269,11 +1267,6 @@ ndadone(struct cam_periph *periph, union ccb *done_ccb)
static int
ndaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct nda_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct nda_softc *)periph->softc;
switch (ccb->ccb_h.status & CAM_STATUS_MASK) {
case CAM_CMD_TIMEOUT:

4
sys/cam/nvme/nvme_xpt.c
View file

@ -258,13 +258,11 @@ nvme_probe_start(struct cam_periph *periph, union ccb *start_ccb)
{
struct ccb_nvmeio *nvmeio;
nvme_probe_softc *softc;
struct cam_path *path;
lun_id_t lun;
CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("nvme_probe_start\n"));
softc = (nvme_probe_softc *)periph->softc;
path = start_ccb->ccb_h.path;
nvmeio = &start_ccb->nvmeio;
lun = xpt_path_lun_id(periph->path);
@ -312,7 +310,6 @@ nvme_probe_done(struct cam_periph *periph, union ccb *done_ccb)
struct cam_path *path;
struct scsi_vpd_device_id *did;
struct scsi_vpd_id_descriptor *idd;
cam_status status;
u_int32_t priority;
int found = 1, e, g, len;
@ -335,7 +332,6 @@ nvme_probe_done(struct cam_periph *periph, union ccb *done_ccb)
/* Don't wedge the queue */
xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
}
status = done_ccb->ccb_h.status & CAM_STATUS_MASK;
/*
* If we get to this point, we got an error status back

2
sys/cam/scsi/scsi_cd.c
View file

@ -3146,12 +3146,10 @@ static int
cdreadtoc(struct cam_periph *periph, u_int32_t mode, u_int32_t start,
u_int8_t *data, u_int32_t len, u_int32_t sense_flags)
{
u_int32_t ntoc;
struct ccb_scsiio *csio;
union ccb *ccb;
int error;
ntoc = len;
error = 0;
ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);

5
sys/cam/scsi/scsi_ch.c
View file

@ -734,11 +734,6 @@ chdone(struct cam_periph *periph, union ccb *done_ccb)
static int
cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct ch_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct ch_softc *)periph->softc;
return (cam_periph_error(ccb, cam_flags, sense_flags));
}

6
sys/cam/scsi/scsi_da.c
View file

@ -4533,13 +4533,11 @@ dadone(struct cam_periph *periph, union ccb *done_ccb)
struct bio *bp, *bp1;
struct da_softc *softc;
struct ccb_scsiio *csio;
u_int32_t priority;
da_ccb_state state;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("dadone\n"));
softc = (struct da_softc *)periph->softc;
priority = done_ccb->ccb_h.pinfo.priority;
csio = &done_ccb->csio;
#if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
@ -5304,7 +5302,6 @@ dadone_probeata(struct cam_periph *periph, union ccb *done_ccb)
u_int32_t priority;
int continue_probe;
int error;
int16_t *ptr;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("dadone_probeata\n"));
@ -5312,7 +5309,6 @@ dadone_probeata(struct cam_periph *periph, union ccb *done_ccb)
priority = done_ccb->ccb_h.pinfo.priority;
csio = &done_ccb->csio;
ata_params = (struct ata_params *)csio->data_ptr;
ptr = (uint16_t *)ata_params;
continue_probe = 0;
error = 0;
@ -5897,12 +5893,10 @@ static void
dadone_tur(struct cam_periph *periph, union ccb *done_ccb)
{
struct da_softc *softc;
struct ccb_scsiio *csio;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("dadone_tur\n"));
softc = (struct da_softc *)periph->softc;
csio = &done_ccb->csio;
cam_periph_assert(periph, MA_OWNED);

5
sys/cam/scsi/scsi_enc.c
View file

@ -345,11 +345,6 @@ enc_close(struct cdev *dev, int flag, int fmt, struct thread *td)
int
enc_error(union ccb *ccb, uint32_t cflags, uint32_t sflags)
{
struct enc_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct enc_softc *)periph->softc;
return (cam_periph_error(ccb, cflags, sflags));
}

4
sys/cam/scsi/scsi_enc_ses.c
View file

@ -1339,7 +1339,6 @@ ses_process_config(enc_softc_t *enc, struct enc_fsm_state *state,
union ccb *ccb, uint8_t **bufp, int error, int xfer_len)
{
struct ses_iterator iter;
ses_softc_t *ses;
enc_cache_t *enc_cache;
ses_cache_t *ses_cache;
uint8_t *buf;
@ -1362,7 +1361,6 @@ ses_process_config(enc_softc_t *enc, struct enc_fsm_state *state,
CAM_DEBUG(enc->periph->path, CAM_DEBUG_SUBTRACE,
("entering %s(%p, %d)\n", __func__, bufp, xfer_len));
ses = enc->enc_private;
enc_cache = &enc->enc_daemon_cache;
ses_cache = enc_cache->private;
buf = *bufp;
@ -2870,7 +2868,6 @@ ses_get_elm_devnames(enc_softc_t *enc, encioc_elm_devnames_t *elmdn)
static int
ses_handle_string(enc_softc_t *enc, encioc_string_t *sstr, int ioc)
{
ses_softc_t *ses;
enc_cache_t *enc_cache;
ses_cache_t *ses_cache;
const struct ses_enc_desc *enc_desc;
@ -2883,7 +2880,6 @@ ses_handle_string(enc_softc_t *enc, encioc_string_t *sstr, int ioc)
uint8_t *buf;
size_t size, rsize;
ses = enc->enc_private;
enc_cache = &enc->enc_daemon_cache;
ses_cache = enc_cache->private;

10
sys/cam/scsi/scsi_pass.c
View file

@ -1202,7 +1202,7 @@ static int
passcopysglist(struct cam_periph *periph, struct pass_io_req *io_req,
ccb_flags direction)
{
bus_size_t kern_watermark, user_watermark, len_copied, len_to_copy;
bus_size_t kern_watermark, user_watermark, len_to_copy;
bus_dma_segment_t *user_sglist, *kern_sglist;
int i, j, error;
@ -1210,7 +1210,6 @@ passcopysglist(struct cam_periph *periph, struct pass_io_req *io_req,
kern_watermark = 0;
user_watermark = 0;
len_to_copy = 0;
len_copied = 0;
user_sglist = io_req->user_segptr;
kern_sglist = io_req->kern_segptr;
@ -1249,8 +1248,6 @@ passcopysglist(struct cam_periph *periph, struct pass_io_req *io_req,
}
}
len_copied += len_to_copy;
if (user_sglist[i].ds_len == user_watermark) {
i++;
user_watermark = 0;
@ -2239,11 +2236,6 @@ passsendccb(struct cam_periph *periph, union ccb *ccb, union ccb *inccb)
static int
passerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct cam_periph *periph;
struct pass_softc *softc;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct pass_softc *)periph->softc;
return(cam_periph_error(ccb, cam_flags, sense_flags));
}