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scsi: zalon: Stop using the SCSI pointer

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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.

Link: https://lore.kernel.org/r/20220218195117.25689-49-bvanassche@acm.org
Cc: Helge Deller <deller@gmx.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2022-02-18 11:51:16 -08:00 committed by Martin K. Petersen
parent dbb2da557a
commit 31160bd3e5
3 changed files with 19 additions and 10 deletions
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22
drivers/scsi/ncr53c8xx.c
View File

@ -514,30 +514,29 @@ static m_addr_t __vtobus(m_bush_t bush, void *m)
* Deal with DMA mapping/unmapping.
*/
/* To keep track of the dma mapping (sg/single) that has been set */
#define __data_mapped SCp.phase
#define __data_mapping SCp.have_data_in
static void __unmap_scsi_data(struct device *dev, struct scsi_cmnd *cmd)
{
switch(cmd->__data_mapped) {
struct ncr_cmd_priv *cmd_priv = scsi_cmd_priv(cmd);
switch(cmd_priv->data_mapped) {
case 2:
scsi_dma_unmap(cmd);
break;
}
cmd->__data_mapped = 0;
cmd_priv->data_mapped = 0;
}
static int __map_scsi_sg_data(struct device *dev, struct scsi_cmnd *cmd)
{
struct ncr_cmd_priv *cmd_priv = scsi_cmd_priv(cmd);
int use_sg;
use_sg = scsi_dma_map(cmd);
if (!use_sg)
return 0;
cmd->__data_mapped = 2;
cmd->__data_mapping = use_sg;
cmd_priv->data_mapped = 2;
cmd_priv->data_mapping = use_sg;
return use_sg;
}
@ -7854,6 +7853,7 @@ static int ncr53c8xx_slave_configure(struct scsi_device *device)
static int ncr53c8xx_queue_command_lck(struct scsi_cmnd *cmd)
{
struct ncr_cmd_priv *cmd_priv = scsi_cmd_priv(cmd);
void (*done)(struct scsi_cmnd *) = scsi_done;
struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
unsigned long flags;
@ -7864,8 +7864,8 @@ printk("ncr53c8xx_queue_command\n");
#endif
cmd->host_scribble = NULL;
cmd->__data_mapped = 0;
cmd->__data_mapping = 0;
cmd_priv->data_mapped = 0;
cmd_priv->data_mapping = 0;
spin_lock_irqsave(&np->smp_lock, flags);
@ -8085,6 +8085,8 @@ struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt,
u_long flags = 0;
int i;
WARN_ON_ONCE(tpnt->cmd_size < sizeof(struct ncr_cmd_priv));
if (!tpnt->name)
tpnt->name = SCSI_NCR_DRIVER_NAME;
if (!tpnt->shost_groups)

6
drivers/scsi/ncr53c8xx.h
View File

@ -1288,6 +1288,12 @@ struct ncr_device {
u8 differential;
};
/* To keep track of the dma mapping (sg/single) that has been set */
struct ncr_cmd_priv {
int data_mapped;
int data_mapping;
};
extern struct Scsi_Host *ncr_attach(struct scsi_host_template *tpnt, int unit, struct ncr_device *device);
extern void ncr53c8xx_release(struct Scsi_Host *host);
irqreturn_t ncr53c8xx_intr(int irq, void *dev_id);

1
drivers/scsi/zalon.c
View File

@ -81,6 +81,7 @@ lasi_scsi_clock(void * hpa, int defaultclock)
static struct scsi_host_template zalon7xx_template = {
.module = THIS_MODULE,
.proc_name = "zalon7xx",
.cmd_size = sizeof(struct ncr_cmd_priv),
};
static int __init