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mtip32xx: fix crash on surprise removal of the drive

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pci and block layers have changed a lot compared to when SRSI support was added.
Given the current state of pci and block layers, this driver do not have to do
any specific handling.

Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Asai Thambi SP 2015-05-11 15:53:18 -07:00 committed by Jens Axboe
parent 686d8e0bb5
commit 2132a54472
1 changed files with 46 additions and 99 deletions
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145
drivers/block/mtip32xx/mtip32xx.c
View file

@ -895,6 +895,10 @@ static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
/* Acknowledge the interrupt status on the port.*/
port_stat = readl(port->mmio + PORT_IRQ_STAT);
if (unlikely(port_stat == 0xFFFFFFFF)) {
mtip_check_surprise_removal(dd->pdev);
return IRQ_HANDLED;
}
writel(port_stat, port->mmio + PORT_IRQ_STAT);
/* Demux port status */
@ -2765,49 +2769,6 @@ static void mtip_hw_debugfs_exit(struct driver_data *dd)
debugfs_remove_recursive(dd->dfs_node);
}
static int mtip_free_orphan(struct driver_data *dd)
{
struct kobject *kobj;
if (dd->bdev) {
if (dd->bdev->bd_holders >= 1)
return -2;
bdput(dd->bdev);
dd->bdev = NULL;
}
mtip_hw_debugfs_exit(dd);
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
if (!test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag) &&
test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) {
put_disk(dd->disk);
} else {
if (dd->disk) {
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_exit(dd, kobj);
kobject_put(kobj);
}
del_gendisk(dd->disk);
put_disk(dd->disk);
dd->disk = NULL;
}
if (dd->queue) {
dd->queue->queuedata = NULL;
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
dd->queue = NULL;
}
}
kfree(dd);
return 0;
}
/*
* Perform any init/resume time hardware setup
*
@ -2955,7 +2916,6 @@ static int mtip_service_thread(void *data)
unsigned long slot, slot_start, slot_wrap;
unsigned int num_cmd_slots = dd->slot_groups * 32;
struct mtip_port *port = dd->port;
int ret;
while (1) {
if (kthread_should_stop() ||
@ -3041,18 +3001,6 @@ restart_eh:
if (kthread_should_stop())
goto st_out;
}
while (1) {
ret = mtip_free_orphan(dd);
if (!ret) {
/* NOTE: All data structures are invalid, do not
* access any here */
return 0;
}
msleep_interruptible(1000);
if (kthread_should_stop())
goto st_out;
}
st_out:
return 0;
}
@ -3380,6 +3328,7 @@ static int mtip_hw_exit(struct driver_data *dd)
/* Release the IRQ. */
irq_set_affinity_hint(dd->pdev->irq, NULL);
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
msleep(1000);
/* Free dma regions */
mtip_dma_free(dd);
@ -4075,52 +4024,51 @@ static int mtip_block_remove(struct driver_data *dd)
{
struct kobject *kobj;
if (!dd->sr) {
mtip_hw_debugfs_exit(dd);
mtip_hw_debugfs_exit(dd);
if (dd->mtip_svc_handler) {
set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
wake_up_interruptible(&dd->port->svc_wait);
kthread_stop(dd->mtip_svc_handler);
}
/* Clean up the sysfs attributes, if created */
if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_exit(dd, kobj);
kobject_put(kobj);
}
if (dd->mtip_svc_handler) {
set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
wake_up_interruptible(&dd->port->svc_wait);
kthread_stop(dd->mtip_svc_handler);
}
/* Clean up the sysfs attributes, if created */
if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_exit(dd, kobj);
kobject_put(kobj);
}
}
if (!dd->sr)
mtip_standby_drive(dd);
/*
* Delete our gendisk structure. This also removes the device
* from /dev
*/
if (dd->bdev) {
bdput(dd->bdev);
dd->bdev = NULL;
}
if (dd->disk) {
del_gendisk(dd->disk);
if (dd->disk->queue) {
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
dd->queue = NULL;
}
put_disk(dd->disk);
}
dd->disk = NULL;
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
} else {
else
dev_info(&dd->pdev->dev, "device %s surprise removal\n",
dd->disk->disk_name);
/*
* Delete our gendisk structure. This also removes the device
* from /dev
*/
if (dd->bdev) {
bdput(dd->bdev);
dd->bdev = NULL;
}
if (dd->disk) {
del_gendisk(dd->disk);
if (dd->disk->queue) {
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
dd->queue = NULL;
}
put_disk(dd->disk);
}
dd->disk = NULL;
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
/* De-initialize the protocol layer. */
mtip_hw_exit(dd);
@ -4516,6 +4464,7 @@ static void mtip_pci_remove(struct pci_dev *pdev)
"Completion workers still active!\n");
}
blk_mq_stop_hw_queues(dd->queue);
/* Clean up the block layer. */
mtip_block_remove(dd);
@ -4533,10 +4482,8 @@ static void mtip_pci_remove(struct pci_dev *pdev)
list_del_init(&dd->remove_list);
spin_unlock_irqrestore(&dev_lock, flags);
if (!dd->sr)
kfree(dd);
else
set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
kfree(dd);
set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
pci_set_drvdata(pdev, NULL);