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scsi: aacraid: Call scsi_done() directly

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The aacraid driver invokes scmd->scsi_done(scmd) for two types of SCSI
commands:

 - SCSI commands initialized by the SCSI mid-layer.

 - SCSI commands initialized by aac_probe_container().

The processing sequence for SCSI commands allocated by
aac_probe_container() is as follows:

aac_probe_container()
-> _aac_probe_container(scmd, aac_probe_container_callback1)
  -> scmd->SCp.ptr = aac_probe_container_callback1
  -> aac_fib_send(..., _aac_probe_container1, scmd)
    -> fibptr->callback = _aac_probe_container1
    -> fibptr->callback_data = scmd

fibptr->callback(scmd)
-> _aac_probe_container1(scmd, fibptr)
   [ ... ]
   -> _aac_probe_container2(scmd, fibptr)
     -> Call scmd->SCp.ptr == aac_probe_container_callback1
       -> scmd->device = NULL;

The processing sequence for SCSI commands allocated by the SCSI mid-layer
if _aac_probe_container() is called is as follows:

aac_queuecommand()
-> aac_scsi_cmd()
  -> _aac_probe_container(scmd, aac_probe_container_callback2)
    -> scmd->SCp.ptr = aac_probe_container_callback2
    -> aac_fib_send(..., _aac_probe_container1, scmd)

fibptr->callback(scmd)
-> _aac_probe_container1(scmd, fibptr)
   [ ... ]
   -> _aac_probe_container2(scmd, fibptr)
     -> Call scmd->SCp.ptr == aac_probe_container_callback2

Preserve the existing call sequences by calling scsi_done() for commands
submitted by the mid-layer or aac_probe_container_scsi_done() for commands
submitted by aac_probe_container().

Link: https://lore.kernel.org/r/20211007202923.2174984-17-bvanassche@acm.org
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 2021-10-07 13:28:11 -07:00 committed by Martin K. Petersen
parent 1dec65e32f
commit 7afdb86379
1 changed files with 11 additions and 5 deletions
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16
drivers/scsi/aacraid/aachba.c
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@ -223,6 +223,7 @@ static long aac_build_sghba(struct scsi_cmnd *scsicmd,
int sg_max, u64 sg_address);
static int aac_convert_sgraw2(struct aac_raw_io2 *rio2,
int pages, int nseg, int nseg_new);
static void aac_probe_container_scsi_done(struct scsi_cmnd *scsi_cmnd);
static int aac_send_srb_fib(struct scsi_cmnd* scsicmd);
static int aac_send_hba_fib(struct scsi_cmnd *scsicmd);
#ifdef AAC_DETAILED_STATUS_INFO
@ -332,7 +333,7 @@ static inline int aac_valid_context(struct scsi_cmnd *scsicmd,
struct fib *fibptr) {
struct scsi_device *device;
if (unlikely(!scsicmd || !scsicmd->scsi_done)) {
if (unlikely(!scsicmd)) {
dprintk((KERN_WARNING "aac_valid_context: scsi command corrupt\n"));
aac_fib_complete(fibptr);
return 0;
@ -519,7 +520,13 @@ int aac_get_containers(struct aac_dev *dev)
static void aac_scsi_done(struct scsi_cmnd *scmd)
{
scmd->scsi_done(scmd);
if (scmd->device->request_queue) {
/* SCSI command has been submitted by the SCSI mid-layer. */
scsi_done(scmd);
} else {
/* SCSI command has been submitted by aac_probe_container(). */
aac_probe_container_scsi_done(scmd);
}
}
static void get_container_name_callback(void *context, struct fib * fibptr)
@ -809,8 +816,8 @@ static void aac_probe_container_scsi_done(struct scsi_cmnd *scsi_cmnd)
int aac_probe_container(struct aac_dev *dev, int cid)
{
struct scsi_cmnd *scsicmd = kmalloc(sizeof(*scsicmd), GFP_KERNEL);
struct scsi_device *scsidev = kmalloc(sizeof(*scsidev), GFP_KERNEL);
struct scsi_cmnd *scsicmd = kzalloc(sizeof(*scsicmd), GFP_KERNEL);
struct scsi_device *scsidev = kzalloc(sizeof(*scsidev), GFP_KERNEL);
int status;
if (!scsicmd || !scsidev) {
@ -818,7 +825,6 @@ int aac_probe_container(struct aac_dev *dev, int cid)
kfree(scsidev);
return -ENOMEM;
}
scsicmd->scsi_done = aac_probe_container_scsi_done;
scsicmd->device = scsidev;
scsidev->sdev_state = 0;