| Message ID | 20230411033928.30397-4-Sergey.Semin@baikalelectronics.ru (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PCI: dwc: Relatively simple fixes and cleanups | expand |
On Tue, Apr 11, 2023 at 06:39:21AM +0300, Serge Semin wrote: > It's safe to enable the asyncronous probe type since the PCIe peripheral > devices probing order isn't essential for booting the system. Moreover > enabling that feature saves 0.5 seconds of bootup time if no any device > attached to the PCIe root port. It's a significant performance gain seeing > the total bootup time takes about 3 seconds. > > Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> - Mani > --- > drivers/pci/controller/dwc/pcie-bt1.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/pci/controller/dwc/pcie-bt1.c b/drivers/pci/controller/dwc/pcie-bt1.c > index 95a723a6fd46..e36a20bf82cf 100644 > --- a/drivers/pci/controller/dwc/pcie-bt1.c > +++ b/drivers/pci/controller/dwc/pcie-bt1.c > @@ -638,6 +638,7 @@ static struct platform_driver bt1_pcie_driver = { > .driver = { > .name = "bt1-pcie", > .of_match_table = bt1_pcie_of_match, > + .probe_type = PROBE_PREFER_ASYNCHRONOUS, > }, > }; > module_platform_driver(bt1_pcie_driver); > -- > 2.40.0 > >
diff --git a/drivers/pci/controller/dwc/pcie-bt1.c b/drivers/pci/controller/dwc/pcie-bt1.c index 95a723a6fd46..e36a20bf82cf 100644 --- a/drivers/pci/controller/dwc/pcie-bt1.c +++ b/drivers/pci/controller/dwc/pcie-bt1.c @@ -638,6 +638,7 @@ static struct platform_driver bt1_pcie_driver = { .driver = { .name = "bt1-pcie", .of_match_table = bt1_pcie_of_match, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, }; module_platform_driver(bt1_pcie_driver);
It's safe to enable the asyncronous probe type since the PCIe peripheral devices probing order isn't essential for booting the system. Moreover enabling that feature saves 0.5 seconds of bootup time if no any device attached to the PCIe root port. It's a significant performance gain seeing the total bootup time takes about 3 seconds. Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> --- drivers/pci/controller/dwc/pcie-bt1.c | 1 + 1 file changed, 1 insertion(+)