[PATCH v4 17/50] scsi: bfa: Stop using the SCSI pointer

Bart Van Assche
2022-02-16T21:03:33Z

Set .cmd_size in the SCSI host template instead of using the SCSI pointer
from struct scsi_cmnd. This patch prepares for removal of the SCSI pointer
from struct scsi_cmnd.

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/bfa/bfad_im.c | 27 ++++++++++++++-------------
drivers/scsi/bfa/bfad_im.h | 16 ++++++++++++++++
2 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
index 759d2bb1ecdd..8419a1a89485 100644
--- a/drivers/scsi/bfa/bfad_im.c
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -150,10 +150,10 @@ bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
wait_queue_head_t *wq;

- cmnd->SCp.Status |= tsk_status << 1;
- set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
- wq = (wait_queue_head_t *) cmnd->SCp.ptr;
- cmnd->SCp.ptr = NULL;
+ bfad_priv(cmnd)->status |= tsk_status << 1;
+ set_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status);
+ wq = bfad_priv(cmnd)->wq;
+ bfad_priv(cmnd)->wq = NULL;

if (wq)
wake_up(wq);
@@ -259,7 +259,7 @@ bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
* happens.
*/
cmnd->host_scribble = NULL;
- cmnd->SCp.Status = 0;
+ bfad_priv(cmnd)->status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
/*
* bfa_itnim can be NULL if the port gets disconnected and the bfa
@@ -326,8 +326,8 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
* if happens.
*/
cmnd->host_scribble = NULL;
- cmnd->SCp.ptr = (char *)&wq;
- cmnd->SCp.Status = 0;
+ bfad_priv(cmnd)->wq = &wq;
+ bfad_priv(cmnd)->status = 0;
bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
/*
* bfa_itnim can be NULL if the port gets disconnected and the bfa
@@ -347,10 +347,9 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
spin_unlock_irqrestore(&bfad->bfad_lock, flags);

- wait_event(wq, test_bit(IO_DONE_BIT,
- (unsigned long *)&cmnd->SCp.Status));
+ wait_event(wq, test_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status));

- task_status = cmnd->SCp.Status >> 1;
+ task_status = bfad_priv(cmnd)->status >> 1;
if (task_status != BFI_TSKIM_STS_OK) {
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"LUN reset failure, status: %d\n", task_status);
@@ -381,16 +380,16 @@ bfad_im_reset_target_handler(struct scsi_cmnd *cmnd)
spin_lock_irqsave(&bfad->bfad_lock, flags);
itnim = bfad_get_itnim(im_port, starget->id);
if (itnim) {
- cmnd->SCp.ptr = (char *)&wq;
+ bfad_priv(cmnd)->wq = &wq;
rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
if (rc == BFA_STATUS_OK) {
/* wait target reset to complete */
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
wait_event(wq, test_bit(IO_DONE_BIT,
- (unsigned long *)&cmnd->SCp.Status));
+ &bfad_priv(cmnd)->status));
spin_lock_irqsave(&bfad->bfad_lock, flags);

- task_status = cmnd->SCp.Status >> 1;
+ task_status = bfad_priv(cmnd)->status >> 1;
if (task_status != BFI_TSKIM_STS_OK)
BFA_LOG(KERN_ERR, bfad, bfa_log_level,
"target reset failure,"
@@ -797,6 +796,7 @@ struct scsi_host_template bfad_im_scsi_host_template = {
.name = BFAD_DRIVER_NAME,
.info = bfad_im_info,
.queuecommand = bfad_im_queuecommand,
+ .cmd_size = sizeof(struct bfad_cmd_priv),
.eh_timed_out = fc_eh_timed_out,
.eh_abort_handler = bfad_im_abort_handler,
.eh_device_reset_handler = bfad_im_reset_lun_handler,
@@ -819,6 +819,7 @@ struct scsi_host_template bfad_im_vport_template = {
.name = BFAD_DRIVER_NAME,
.info = bfad_im_info,
.queuecommand = bfad_im_queuecommand,
+ .cmd_size = sizeof(struct bfad_cmd_priv),
.eh_timed_out = fc_eh_timed_out,
.eh_abort_handler = bfad_im_abort_handler,
.eh_device_reset_handler = bfad_im_reset_lun_handler,
diff --git a/drivers/scsi/bfa/bfad_im.h b/drivers/scsi/bfa/bfad_im.h
index 829345b514d1..c03b225ea1ba 100644
--- a/drivers/scsi/bfa/bfad_im.h
+++ b/drivers/scsi/bfa/bfad_im.h
@@ -43,6 +43,22 @@ u32 bfad_im_supported_speeds(struct bfa_s *bfa);
*/
#define IO_DONE_BIT 0

+/**
+ * struct bfad_cmd_priv - private data per SCSI command.
+ * @status: Lowest bit represents IO_DONE. The next seven bits hold a value of
+ * type enum bfi_tskim_status.
+ * @wq: Wait queue used to wait for completion of an operation.
+ */
+struct bfad_cmd_priv {
+ unsigned long status;
+ wait_queue_head_t *wq;
+};
+
+static inline struct bfad_cmd_priv *bfad_priv(struct scsi_cmnd *cmd)
+{
+ return scsi_cmd_priv(cmd);
+}
+
struct bfad_itnim_data_s {
struct bfad_itnim_s *itnim;
};