scsi: hisi_sas: Initialise devices in .slave_alloc callback

Perform driver-specific SCSI device initialization in the designated SCSI midlayer callback instead of relying on the libsas "device found" callback. The SCSI midlayer .slave_alloc interface is called prior to sending any I/O to the device. Link: https://lore.kernel.org/r/1634041588-74824-2-git-send-email-john.garry@huawei.com Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
mariux64 · Oct 13, 2021 · 36c6b76 · 36c6b76
1 parent d489f18
commit 36c6b76
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Showing 5 changed files with 18 additions and 6 deletions.
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -649,6 +649,7 @@ extern int hisi_sas_probe(struct platform_device *pdev,
 extern int hisi_sas_remove(struct platform_device *pdev);
 
 extern int hisi_sas_slave_configure(struct scsi_device *sdev);
+extern int hisi_sas_slave_alloc(struct scsi_device *sdev);
 extern int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time);
 extern void hisi_sas_scan_start(struct Scsi_Host *shost);
 extern int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type);

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -756,6 +756,20 @@ static int hisi_sas_init_device(struct domain_device *device)
 	return rc;
 }
 
+int hisi_sas_slave_alloc(struct scsi_device *sdev)
+{
+	struct domain_device *ddev;
+	int rc;
+
+	rc = sas_slave_alloc(sdev);
+	if (rc)
+		return rc;
+	ddev = sdev_to_domain_dev(sdev);
+
+	return hisi_sas_init_device(ddev);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_slave_alloc);
+
 static int hisi_sas_dev_found(struct domain_device *device)
 {
 	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
@@ -802,9 +816,6 @@ static int hisi_sas_dev_found(struct domain_device *device)
 	dev_info(dev, "dev[%d:%x] found\n",
 		sas_dev->device_id, sas_dev->dev_type);
 
-	rc = hisi_sas_init_device(device);
-	if (rc)
-		goto err_out;
 	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
 	return 0;
 

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -1771,7 +1771,7 @@ static struct scsi_host_template sht_v1_hw = {
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
 	.eh_device_reset_handler = sas_eh_device_reset_handler,
 	.eh_target_reset_handler = sas_eh_target_reset_handler,
-	.slave_alloc		= sas_slave_alloc,
+	.slave_alloc		= hisi_sas_slave_alloc,
 	.target_destroy		= sas_target_destroy,
 	.ioctl			= sas_ioctl,
 #ifdef CONFIG_COMPAT

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -3584,7 +3584,7 @@ static struct scsi_host_template sht_v2_hw = {
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
 	.eh_device_reset_handler = sas_eh_device_reset_handler,
 	.eh_target_reset_handler = sas_eh_target_reset_handler,
-	.slave_alloc		= sas_slave_alloc,
+	.slave_alloc		= hisi_sas_slave_alloc,
 	.target_destroy		= sas_target_destroy,
 	.ioctl			= sas_ioctl,
 #ifdef CONFIG_COMPAT

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -3157,7 +3157,7 @@ static struct scsi_host_template sht_v3_hw = {
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
 	.eh_device_reset_handler = sas_eh_device_reset_handler,
 	.eh_target_reset_handler = sas_eh_target_reset_handler,
-	.slave_alloc		= sas_slave_alloc,
+	.slave_alloc		= hisi_sas_slave_alloc,
 	.target_destroy		= sas_target_destroy,
 	.ioctl			= sas_ioctl,
 #ifdef CONFIG_COMPAT