[PATCH 17/84] aacraid: Call scsi_done() directly
From: Bart Van Assche <bvanassche@acm.org>
Date: 2021-09-18 00:06:40
Subsystem:
aacraid scsi raid driver, scsi subsystem, the rest · Maintainers:
Adaptec OEM Raid Solutions, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
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().
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/aacraid/aachba.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 40b86acac17b..59f6b7b2a70a 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c@@ -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;