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scsi: aacraid: use scsi_host_(block,unblock) to block I/O

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Use scsi_host_block() and scsi_host_unblock() instead of
scsi_block_requests()/scsi_unblock_requests() to block and unblock I/O.
This has the advantage that the block layer will stop sending I/O to the
adapter instead of having the SCSI midlayer requeueing I/O internally.

Link: https://lore.kernel.org/r/20200228075318.91255-10-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P < Balsundar.P@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2020-02-28 08:53:14 +01:00 committed by Martin K. Petersen
parent 2bb955840c
commit 3d3ca53b16
2 changed files with 8 additions and 21 deletions
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14
drivers/scsi/aacraid/commsup.c
View file

@ -1477,7 +1477,6 @@ static int _aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
int index, quirks;
int retval;
struct Scsi_Host *host = aac->scsi_host_ptr;
struct scsi_device *dev;
int jafo = 0;
int bled;
u64 dmamask;
@ -1605,16 +1604,7 @@ static int _aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
*/
scsi_host_complete_all_commands(host, DID_RESET);
/*
* Any Device that was already marked offline needs to be marked
* running
*/
__shost_for_each_device(dev, host) {
if (!scsi_device_online(dev))
scsi_device_set_state(dev, SDEV_RUNNING);
}
retval = 0;
out:
aac->in_reset = 0;
@ -1655,7 +1645,7 @@ int aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
* target (block maximum 60 seconds). Although not necessary,
* it does make us a good storage citizen.
*/
scsi_block_requests(host);
scsi_host_block(host);
/* Quiesce build, flush cache, write through mode */
if (forced < 2)
@ -1666,7 +1656,7 @@ int aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
retval = _aac_reset_adapter(aac, bled, reset_type);
spin_unlock_irqrestore(host->host_lock, flagv);
scsi_unblock_requests(host);
retval = scsi_host_unblock(host, SDEV_RUNNING);
if ((forced < 2) && (retval == -ENODEV)) {
/* Unwind aac_send_shutdown() IOP_RESET unsupported/disabled */

15
drivers/scsi/aacraid/linit.c
View file

@ -1894,7 +1894,7 @@ static int aac_suspend(struct pci_dev *pdev, pm_message_t state)
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct aac_dev *aac = (struct aac_dev *)shost->hostdata;
scsi_block_requests(shost);
scsi_host_block(shost);
aac_cancel_rescan_worker(aac);
aac_send_shutdown(aac);
@ -1930,7 +1930,7 @@ static int aac_resume(struct pci_dev *pdev)
* aac_send_shutdown() to block ioctls from upperlayer
*/
aac->adapter_shutdown = 0;
scsi_unblock_requests(shost);
scsi_host_unblock(shost, SDEV_RUNNING);
return 0;
@ -1945,7 +1945,8 @@ fail_device:
static void aac_shutdown(struct pci_dev *dev)
{
struct Scsi_Host *shost = pci_get_drvdata(dev);
scsi_block_requests(shost);
scsi_host_block(shost);
__aac_shutdown((struct aac_dev *)shost->hostdata);
}
@ -1991,7 +1992,7 @@ static pci_ers_result_t aac_pci_error_detected(struct pci_dev *pdev,
case pci_channel_io_frozen:
aac->handle_pci_error = 1;
scsi_block_requests(aac->scsi_host_ptr);
scsi_host_block(shost);
aac_cancel_rescan_worker(aac);
scsi_host_complete_all_commands(shost, DID_NO_CONNECT);
aac_release_resources(aac);
@ -2044,7 +2045,6 @@ fail_device:
static void aac_pci_resume(struct pci_dev *pdev)
{
struct Scsi_Host *shost = pci_get_drvdata(pdev);
struct scsi_device *sdev = NULL;
struct aac_dev *aac = (struct aac_dev *)shost_priv(shost);
if (aac_adapter_ioremap(aac, aac->base_size)) {
@ -2071,10 +2071,7 @@ static void aac_pci_resume(struct pci_dev *pdev)
aac->adapter_shutdown = 0;
aac->handle_pci_error = 0;
shost_for_each_device(sdev, shost)
if (sdev->sdev_state == SDEV_OFFLINE)
sdev->sdev_state = SDEV_RUNNING;
scsi_unblock_requests(aac->scsi_host_ptr);
scsi_host_unblock(shost, SDEV_RUNNING);
aac_scan_host(aac);
pci_save_state(pdev);