On Wed, Jul 12, 2023 at 12:02:57PM +0100, Mark Brown wrote: > The i.MX integration for the DesignWare PCI controller has a _host_exit() > operation which undoes everything that the _host_init() operation does but > does not wire this up as the host_deinit callback for the core, or call it > in any path other than suspend. This means that if we ever unwind the > initial probe of the device, for example because it fails, the regulator > core complains that the regulators for the device were left enabled: > > imx6q-pcie 33800000.pcie: iATU: unroll T, 4 ob, 4 ib, align 64K, limit 16G > imx6q-pcie 33800000.pcie: Phy link never came up > imx6q-pcie 33800000.pcie: Phy link never came up > imx6q-pcie: probe of 33800000.pcie failed with error -110 > ------------[ cut here ]------------ > WARNING: CPU: 2 PID: 46 at drivers/regulator/core.c:2396 _regulator_put+0x110/0x128 > > Wire up the callback so that the core can clean up after itself. > > Reviewed-by: Richard Zhu <hongxing.zhu@xxxxxxx> > Tested-by: Fabio Estevam <festevam@xxxxxxxxx> > Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> - Mani > --- > Changes in v2: > - Rebase onto v6.5-rc1. > - Link to v1: https://lore.kernel.org/r/20230703-pci-imx-regulator-cleanup-v1-1-b6c050ae2bad@xxxxxxxxxx > --- > drivers/pci/controller/dwc/pci-imx6.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c > index 27aaa2a6bf39..a18c20085e94 100644 > --- a/drivers/pci/controller/dwc/pci-imx6.c > +++ b/drivers/pci/controller/dwc/pci-imx6.c > @@ -1040,6 +1040,7 @@ static void imx6_pcie_host_exit(struct dw_pcie_rp *pp) > > static const struct dw_pcie_host_ops imx6_pcie_host_ops = { > .host_init = imx6_pcie_host_init, > + .host_deinit = imx6_pcie_host_exit, > }; > > static const struct dw_pcie_ops dw_pcie_ops = { > > --- > base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5 > change-id: 20230703-pci-imx-regulator-cleanup-a17c8fd15ec5 > > Best regards, > -- > Mark Brown <broonie@xxxxxxxxxx> > -- மணிவண்ணன் சதாசிவம்
