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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 <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2019-06-24 10:42:54 -04:00 committed by Martin K. Petersen
parent 381abbd1f7
commit 48d6f0a6a5
1 changed files with 4 additions and 9 deletions
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13
drivers/scsi/mpt3sas/mpt3sas_base.c
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@ -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;
}