From 48d6f0a6a5595abb38d899dbf8ca09f7dc858d2b Mon Sep 17 00:00:00 2001 From: Sreekanth Reddy Date: Mon, 24 Jun 2019 10:42:54 -0400 Subject: [PATCH] scsi: mpt3sas: Use configured PCIe link speed, not max When enabling high iops queues, the driver should use the HBA's configured PCIe link speed instead of looking for the maximum link speed. I.e. enable high iops queues only if Aero/Sea HBA's configured PCIe link speed is set to 16GT/s. Signed-off-by: Sreekanth Reddy Signed-off-by: Martin K. Petersen --- drivers/scsi/mpt3sas/mpt3sas_base.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index d55f13495b20..8a47e0238a11 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -2979,7 +2979,7 @@ static void _base_check_and_enable_high_iops_queues(struct MPT3SAS_ADAPTER *ioc, int hba_msix_vector_count) { - enum pci_bus_speed speed = PCI_SPEED_UNKNOWN; + u16 lnksta, speed; if (perf_mode == MPT_PERF_MODE_IOPS || perf_mode == MPT_PERF_MODE_LATENCY) { @@ -2989,15 +2989,10 @@ _base_check_and_enable_high_iops_queues(struct MPT3SAS_ADAPTER *ioc, if (perf_mode == MPT_PERF_MODE_DEFAULT) { - speed = pcie_get_speed_cap(ioc->pdev); - dev_info(&ioc->pdev->dev, "PCIe device speed is %s\n", - speed == PCIE_SPEED_2_5GT ? "2.5GHz" : - speed == PCIE_SPEED_5_0GT ? "5.0GHz" : - speed == PCIE_SPEED_8_0GT ? "8.0GHz" : - speed == PCIE_SPEED_16_0GT ? "16.0GHz" : - "Unknown"); + pcie_capability_read_word(ioc->pdev, PCI_EXP_LNKSTA, &lnksta); + speed = lnksta & PCI_EXP_LNKSTA_CLS; - if (speed < PCIE_SPEED_16_0GT) { + if (speed < 0x4) { ioc->high_iops_queues = 0; return; } -- 2.11.0