On 06/04/2013 12:57 PM, Jay Agarwal wrote:
> - Enable PCIe root port 2 for Cardhu
> - Make private data structure for each SoC
> - Add required Tegra30 clocks and regulators
> - Add Tegra30 specific code in enable controller
> - Corrected logic in read/write config space to
> display right device number on bus 0
> - Fixed unnecessary freeing of tegra_pcie_bus structure in tegra_pcie_remove
> - Added Tegra30 specific properties in pci binding document
> diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
> +- avdd-supply: Power supply for controller (1.05V)
> + "cml": The Tegra clock of that name
Both those changes need to mention that those additions are only
required for Tegra30, not Tegra20. In other words,
+- avdd-supply: Power supply for controller (1.05V) (not required for
Tegra20)
+ "cml": The Tegra clock of that name (not required for Tegra20)
You probably also want to explicitly mention nvidia,tegra30-pcie as a
legal compatible value.
> diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
> +/* used to differentiate tegra chips code */
> +struct tegra_pcie_soc_data {
> + unsigned int num_max_ports;
nit: "num max" seems redundant. max_ports or num_ports would be better.
> struct tegra_pcie_port {
> @@ -384,7 +408,7 @@ static int tegra_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
> struct tegra_pcie_port *port;
>
> list_for_each_entry(port, &pcie->ports, list) {
> - if (port->index + 1 == slot) {
> + if (port->index == slot) {
This and the equivalent change in tegra_pcie_write_conf() seem like a
bug-fix unrelated to the addition of Tegra30 support. Hence, they should
be a separate patch.
> @@ -398,7 +422,6 @@ static int tegra_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
> *value = 0xffffffff;
> return PCIBIOS_DEVICE_NOT_FOUND;
> }
> -
> addr += tegra_pcie_conf_offset(devfn, where);
Unnecessary white-space change.
> @@ -1549,10 +1660,9 @@ static int tegra_pcie_remove(struct platform_device *pdev)
> struct tegra_pcie_bus *bus;
> int err;
>
> - list_for_each_entry(bus, &pcie->busses, list) {
> + list_for_each_entry(bus, &pcie->busses, list)
> vunmap(bus->area->addr);
> - kfree(bus);
> - }
> + kfree(bus);
This doesn't look right. Can you please explain it further? This is
looping over every bus in a dynamic list, so surely each entry needs to
be freed? Did you do this to avoid a crash? If so, the issue is likely
that the loop should use list_for_each_entry_safe() rather than
list_for_each_entry().
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