From f281233d3eba15fb225d21ae2e228fd4553d824a Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Tue, 16 Nov 2010 02:10:29 -0500 Subject: SCSI host lock push-down Move the mid-layer's ->queuecommand() invocation from being locked with the host lock to being unlocked to facilitate speeding up the critical path for drivers who don't need this lock taken anyway. The patch below presents a simple SCSI host lock push-down as an equivalent transformation. No locking or other behavior should change with this patch. All existing bugs and locking orders are preserved. Additionally, add one parameter to queuecommand, struct Scsi_Host * and remove one parameter from queuecommand, void (*done)(struct scsi_cmnd *) Scsi_Host* is a convenient pointer that most host drivers need anyway, and 'done' is redundant to struct scsi_cmnd->scsi_done. Minimal code disturbance was attempted with this change. Most drivers needed only two one-line modifications for their host lock push-down. Signed-off-by: Jeff Garzik Acked-by: James Bottomley Signed-off-by: Linus Torvalds --- drivers/scsi/pmcraid.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/pmcraid.c') diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c index cf89091e4c3d..5e76a624cb08 100644 --- a/drivers/scsi/pmcraid.c +++ b/drivers/scsi/pmcraid.c @@ -3478,7 +3478,7 @@ static int pmcraid_copy_sglist( * SCSI_MLQUEUE_DEVICE_BUSY if device is busy * SCSI_MLQUEUE_HOST_BUSY if host is busy */ -static int pmcraid_queuecommand( +static int pmcraid_queuecommand_lck( struct scsi_cmnd *scsi_cmd, void (*done) (struct scsi_cmnd *) ) @@ -3584,6 +3584,8 @@ static int pmcraid_queuecommand( return rc; } +static DEF_SCSI_QCMD(pmcraid_queuecommand) + /** * pmcraid_open -char node "open" entry, allowed only users with admin access */ -- cgit v1.2.3 From 5da61410054d125e63aeab9cc7a11874a69465c0 Mon Sep 17 00:00:00 2001 From: Anil Ravindranath Date: Tue, 16 Nov 2010 13:43:41 -0800 Subject: [SCSI] pmcraid: disable msix and expand device config entry Firmware requires a larger configuration entry size than the driver currently allows, and MSI-X pretty much doesn't work with current FW, so disable it for now. Signed-off-by: Anil Ravindranath Signed-off-by: James Bottomley --- drivers/scsi/pmcraid.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/pmcraid.c') diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c index 5e76a624cb08..300d59f389da 100644 --- a/drivers/scsi/pmcraid.c +++ b/drivers/scsi/pmcraid.c @@ -62,6 +62,7 @@ static unsigned int pmcraid_debug_log; static unsigned int pmcraid_disable_aen; static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST; +static unsigned int pmcraid_enable_msix; /* * Data structures to support multiple adapters by the LLD. @@ -4691,7 +4692,8 @@ pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance) int rc; struct pci_dev *pdev = pinstance->pdev; - if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) { + if ((pmcraid_enable_msix) && + (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) { int num_hrrq = PMCRAID_NUM_MSIX_VECTORS; struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS]; int i; -- cgit v1.2.3 From 1d3c16a818e992c199844954d95c17fd7ce6cbba Mon Sep 17 00:00:00 2001 From: Jon Mason Date: Tue, 30 Nov 2010 17:43:26 -0600 Subject: PCI: make pci_restore_state return void pci_restore_state only ever returns 0, thus there is no benefit in having it return any value. Also, a large majority of the callers do not check the return code of pci_restore_state. Make the pci_restore_state a void return and avoid the overhead. Acked-by: Mauro Carvalho Chehab Signed-off-by: Jon Mason Signed-off-by: Jesse Barnes --- drivers/scsi/pmcraid.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'drivers/scsi/pmcraid.c') diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c index 300d59f389da..321cf3ae8630 100644 --- a/drivers/scsi/pmcraid.c +++ b/drivers/scsi/pmcraid.c @@ -2228,12 +2228,7 @@ static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd) /* Once either bist or pci reset is done, restore PCI config * space. If this fails, proceed with hard reset again */ - if (pci_restore_state(pinstance->pdev)) { - pmcraid_info("config-space error resetting again\n"); - pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT; - pmcraid_reset_alert(cmd); - break; - } + pci_restore_state(pinstance->pdev); /* fail all pending commands */ pmcraid_fail_outstanding_cmds(pinstance); -- cgit v1.2.3