Re: [PATCH v17 00/10] LPC: legacy ISA I/O support

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On 21/03/2018 23:39, Bjorn Helgaas wrote:
On Thu, Mar 15, 2018 at 02:15:49AM +0800, John Garry wrote:
This patchset supports the IPMI-bt device attached to the Low-Pin-Count
interface implemented on Hisilicon Hip06/Hip07 SoC.
                        -----------
                        | LPC host|
                        |         |
                        -----------
                             |
                _____________V_______________LPC
                  |                       |
                  V                       V
                                     ------------
                                     |  BT(ipmi)|
                                     ------------
...

Gabriele Paoloni (2):
  PCI: Remove unused __weak attribute in pci_register_io_range()
  PCI: Add fwnode handler as input param of pci_register_io_range()

John Garry (4):
  ACPI / scan: rename acpi_is_serial_bus_slave() to widen use
  ACPI / scan: do not enumerate Indirect IO host children
  HISI LPC: Add ACPI support
  MAINTAINERS: Add maintainer for HiSilicon LPC driver

Zhichang Yuan (4):
  LIB: Introduce a generic PIO mapping method
  PCI: Apply the new generic I/O management on PCI IO hosts
  OF: Add missing I/O range exception for indirect-IO devices
  HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings

 .../arm/hisilicon/hisilicon-low-pin-count.txt      |  33 ++
 MAINTAINERS                                        |   7 +
 drivers/acpi/pci_root.c                            |   8 +-
 drivers/acpi/scan.c                                |  33 +-
 drivers/bus/Kconfig                                |   8 +
 drivers/bus/Makefile                               |   2 +
 drivers/bus/hisi_lpc.c                             | 623 +++++++++++++++++++++
 drivers/of/address.c                               |  96 +++-
 drivers/pci/pci.c                                  |  95 +---
 include/acpi/acpi_bus.h                            |   2 +-
 include/asm-generic/io.h                           |   4 +-
 include/linux/logic_pio.h                          | 124 ++++
 include/linux/pci.h                                |   3 +-
 lib/Kconfig                                        |  15 +
 lib/Makefile                                       |   2 +
 lib/logic_pio.c                                    | 282 ++++++++++
 16 files changed, 1229 insertions(+), 108 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/hisilicon/hisilicon-low-pin-count.txt
 create mode 100644 drivers/bus/hisi_lpc.c
 create mode 100644 include/linux/logic_pio.h
 create mode 100644 lib/logic_pio.c

I applied this whole series to pci/lpc for v4.17.

I made the following whitespace and other trivial corrections.
Hopefully I didn't break anything.


Hi Bjorn,

Super thanks for doing this. In general the changes look ok. However a build issue has appeared, below.

I retested your pci/lpc branch (with the build fix), and it seems fine.

BTW, I am also testing with a "Serial controller: MosChip Semiconductor Technology Ltd. PCIe 9912 Multi-I/O Controller" in loopback mode to ensure PCI host IO space is not broken and this is ok.

Thanks again, and to everyone who has helped with this patchset!

John


--- changelogs.orig	2018-03-21 18:37:47.209217927 -0500
+++ changelogs	2018-03-21 18:37:35.993074570 -0500
@@ -1,29 +1,31 @@
-commit cc88cacce96a
+commit eb3a2ff7e72e
 Author: John Garry <john.garry@xxxxxxxxxx>
 Date:   Thu Mar 15 02:15:59 2018 +0800


[ ... ]


@@ -134,21 +132,20 @@ static struct logic_pio_hwaddr *find_io_range(unsigned long pio)
  * logic_pio_to_hwaddr - translate logical PIO to HW address
  * @pio: logical PIO value
  *
- * Returns HW address if valid, ~0 otherwise
+ * Returns HW address if valid, ~0 otherwise.
  *
- * Translate the input logical pio to the corresponding hardware address.
- * The input pio should be unique in the whole logical PIO space.
+ * Translate the input logical PIO to the corresponding hardware address.
+ * The input PIO should be unique in the whole logical PIO space.
  */
 resource_size_t logic_pio_to_hwaddr(unsigned long pio)
 {
 	struct logic_pio_hwaddr *range;
-	resource_size_t hwaddr = (resource_size_t)~0;

 	range = find_io_range(pio);
 	if (range)
-		hwaddr = range->hw_start + pio - range->io_start;
+		return = range->hw_start + pio - range->io_start;

Please remove '='


-	return hwaddr;
+	return (resource_size_t)~0;
 }

 /**
@@ -159,15 +156,14 @@ resource_size_t logic_pio_to_hwaddr(unsigned long pio)
  *
  * Returns Logical PIO value if successful, ~0UL otherwise
  */




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