From 3eb7a51a3ae0ed0227e051ecf75199fccbb4cc73 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 30 Jan 2007 01:18:35 -0800 Subject: [PATCH] [SCSI] sas_ata: Satisfy libata qc function locking requirements ata_qc_complete and ata_sas_queuecmd require that the port lock be held when they are called. sas_ata doesn't do this, leading to BUG messages about qc tags newly allocated qc tags already being in use. This patch fixes the locking, which should clean up the rest of those messages. So far I've tested this against an IBM x206m with two SATA disks with no BUG messages and no other signs of things going wrong, and the machine finally passed the pounder stress test. Signed-off-by: Darrick J. Wong Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 4 ++++ drivers/scsi/libsas/sas_scsi_host.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index de42b5b801cd..0bb1a149a9c2 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -92,7 +92,9 @@ static void sas_ata_task_done(struct sas_task *task) struct task_status_struct *stat = &task->task_status; struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; enum ata_completion_errors ac; + unsigned long flags; + spin_lock_irqsave(dev->sata_dev.ap->lock, flags); if (stat->stat == SAS_PROTO_RESPONSE) { ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); @@ -113,6 +115,8 @@ static void sas_ata_task_done(struct sas_task *task) } ata_qc_complete(qc); + spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); + list_del_init(&task->list); sas_free_task(task); } diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index dbc2a912114f..ba5c91b81312 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -216,8 +216,12 @@ int sas_queuecommand(struct scsi_cmnd *cmd, struct sas_task *task; if (dev_is_sata(dev)) { + unsigned long flags; + + spin_lock_irqsave(dev->sata_dev.ap->lock, flags); res = ata_sas_queuecmd(cmd, scsi_done, dev->sata_dev.ap); + spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags); goto out; } -- 2.30.2