[smartpqi updates PATCH V2 01/11] smartpqi: update device removal management

Don Brace
2021-09-28T23:54:50Z

Update device removal path to handle issues for:
rmmod - Correct stack trace when removing devices.
rmmod - Synchronize SCSI cache.
Update handling for removing devices using sysfs.

This patch also aligns the device removal code with
our out-of-box driver.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
drivers/scsi/smartpqi/smartpqi_init.c | 64 ++++++++++++---------------
1 file changed, 28 insertions(+), 36 deletions(-)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index ecb2af3f43ca..97027574eb1f 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -1693,8 +1693,6 @@ static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi
{
int rc;

- pqi_device_remove_start(device);
-
rc = pqi_device_wait_for_pending_io(ctrl_info, device,
PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
if (rc)
@@ -1708,6 +1706,8 @@ static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi
scsi_remove_device(device->sdev);
else
pqi_remove_sas_device(device);
+
+ pqi_device_remove_start(device);
}

/* Assumes the SCSI device list lock is held. */
@@ -1986,7 +1986,7 @@ static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
scsi_device_list_entry) {
if (device->device_gone) {
- list_del_init(&device->scsi_device_list_entry);
+ list_del(&device->scsi_device_list_entry);
list_add_tail(&device->delete_list_entry, &delete_list);
}
}
@@ -2025,15 +2025,13 @@ static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
if (device->volume_offline) {
pqi_dev_info(ctrl_info, "offline", device);
pqi_show_volume_status(ctrl_info, device);
- }
- list_del(&device->delete_list_entry);
- if (pqi_is_device_added(device)) {
- pqi_remove_device(ctrl_info, device);
} else {
- if (!device->volume_offline)
- pqi_dev_info(ctrl_info, "removed", device);
- pqi_free_device(device);
+ pqi_dev_info(ctrl_info, "removed", device);
}
+ if (pqi_is_device_added(device))
+ pqi_remove_device(ctrl_info, device);
+ list_del(&device->delete_list_entry);
+ pqi_free_device(device);
}

/*
@@ -2328,6 +2326,25 @@ static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
return rc;
}

+static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned long flags;
+ struct pqi_scsi_dev *device;
+ struct pqi_scsi_dev *next;
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (pqi_is_device_added(device))
+ pqi_remove_device(ctrl_info, device);
+ list_del(&device->scsi_device_list_entry);
+ pqi_free_device(device);
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+}
+
static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
{
int rc;
@@ -6120,31 +6137,6 @@ static int pqi_slave_configure(struct scsi_device *sdev)
return 0;
}

-static void pqi_slave_destroy(struct scsi_device *sdev)
-{
- unsigned long flags;
- struct pqi_scsi_dev *device;
- struct pqi_ctrl_info *ctrl_info;
-
- ctrl_info = shost_to_hba(sdev->host);
-
- spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
-
- device = sdev->hostdata;
- if (device) {
- sdev->hostdata = NULL;
- if (!list_empty(&device->scsi_device_list_entry))
- list_del(&device->scsi_device_list_entry);
- }
-
- spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
-
- if (device) {
- pqi_dev_info(ctrl_info, "removed", device);
- pqi_free_device(device);
- }
-}
-
static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
{
struct pci_dev *pci_dev;
@@ -6938,7 +6930,6 @@ static struct scsi_host_template pqi_driver_template = {
.ioctl = pqi_ioctl,
.slave_alloc = pqi_slave_alloc,
.slave_configure = pqi_slave_configure,
- .slave_destroy = pqi_slave_destroy,
.map_queues = pqi_map_queues,
.sdev_attrs = pqi_sdev_attrs,
.shost_attrs = pqi_shost_attrs,
@@ -8169,6 +8160,7 @@ static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
{
pqi_cancel_rescan_worker(ctrl_info);
pqi_cancel_update_time_worker(ctrl_info);
+ pqi_remove_all_scsi_devices(ctrl_info);
pqi_unregister_scsi(ctrl_info);
if (ctrl_info->pqi_mode_enabled)
pqi_revert_to_sis_mode(ctrl_info);
--
2.28.0.rc1.9.ge7ae437ac1