On Thu, Nov 26, 2020 at 12:55:54AM +0530, Vidya Sagar wrote: > PCIe controller in Tegra194 requires the "dbi" region base address to be > programmed in one of the application logic registers to enable CPU access > to the "dbi" region. But, commit a0fd361db8e5 ("PCI: dwc: Move "dbi", > "dbi2", and "addr_space" resource setup into common code") moved the code > that reads the whereabouts of "dbi" region to the common code causing the > existing code in pcie-tegra194.c file to program NULL in the application > logic registers. This is causing null pointer dereference when the "dbi" > registers are accessed. This issue is fixed by explicitly reading the > "dbi" base address from DT node. > > Fixes: a0fd361db8e5 ("PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into common code") > Signed-off-by: Vidya Sagar > --- > drivers/pci/controller/dwc/pcie-tegra194.c | 7 +++++++ > 1 file changed, 7 insertions(+) Tested-by: Thierry Reding Acked-by: Thierry Reding