linux.git/drivers/pci/setup-bus.c, branch v5.16

PCI: Prefer 'unsigned int' over bare 'unsigned'

2021-10-27T18:41:22+00:00

The bare "unsigned" type implicitly means "unsigned int", but the preferred
coding style is to use the complete type name.

Update the bare use of "unsigned" to the preferred "unsigned int".

No change to functionality intended.

See a1ce18e4f941 ("checkpatch: warn on bare unsigned or signed declarations
without int").

Link: https://lore.kernel.org/r/20211013014136.1117543-1-kw@linux.com
Signed-off-by: Krzysztof Wilczyński 
Signed-off-by: Bjorn Helgaas

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva

Merge branch 'pci/doc'

2020-08-05T23:24:22+00:00

- Fix several kerneldoc warnings (Krzysztof Kozlowski)

* pci/doc:
  PCI: Fix kerneldoc warnings

PCI: Fix kerneldoc warnings

2020-08-05T23:23:14+00:00

Fix kerneldoc warnings, e.g.,

  $ make W=1 drivers/pci/
  drivers/pci/ats.c:196: warning: Function parameter or member 'pdev' not described in 'pci_enable_pri'
  drivers/pci/ats.c:196: warning: Function parameter or member 'reqs' not described in 'pci_enable_pri'
  ...

Link: https://lore.kernel.org/r/20200729201224.26799-2-krzk@kernel.org
Link: https://lore.kernel.org/r/20200729201224.26799-3-krzk@kernel.org
Link: https://lore.kernel.org/r/20200729201224.26799-4-krzk@kernel.org
Link: https://lore.kernel.org/r/20200729201224.26799-5-krzk@kernel.org
Link: https://lore.kernel.org/r/20200729201224.26799-6-krzk@kernel.org
Link: https://lore.kernel.org/r/20200729201224.26799-7-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Bjorn Helgaas

PCI: Fix error in panic message

2020-07-09T21:01:09+00:00

Use kzalloc() instead of kmalloc() in the panic message.

[bhelgaas: drop similar ibmphp_pci.c change since it's not obviously
correct]
Link: https://lore.kernel.org/r/1594279708-34369-1-git-send-email-wang.yi59@zte.com.cn
Signed-off-by: Liao Pingfang 
Signed-off-by: Yi Wang 
Signed-off-by: Bjorn Helgaas

Merge branch 'remotes/lorenzo/pci/host-generic'

2020-06-04T17:59:16+00:00

  - Constify struct pci_ecam_ops (Rob Herring)

  - Support building as modules (Rob Herring)

  - Eliminate wrappers for pci_host_common_probe() by using DT match table
    data (Rob Herring)

* remotes/lorenzo/pci/host-generic:
  PCI: host-generic: Eliminate pci_host_common_probe wrappers
  PCI: host-generic: Support building as modules
  PCI: Constify struct pci_ecam_ops

# Conflicts:
#	drivers/pci/controller/dwc/pcie-hisi.c

PCI: Use bridge window names (PCI_BRIDGE_IO_WINDOW etc)

2020-05-21T20:53:07+00:00

Use bridge resource definitions instead of using the PCI_BRIDGE_RESOURCES
constant with an integer offeset.

Link: https://lore.kernel.org/r/20200520183411.1534621-2-kw@linux.com
Signed-off-by: Krzysztof Wilczynski 
Signed-off-by: Bjorn Helgaas

PCI: host-generic: Support building as modules

2020-05-01T15:29:27+00:00

Enable building host-generic and its host-common dependency as a
module.

Link: https://lore.kernel.org/r/20200409234923.21598-3-robh@kernel.org
Signed-off-by: Rob Herring 
Signed-off-by: Lorenzo Pieralisi 
Acked-by: Will Deacon 
Acked-by: Bjorn Helgaas 
Cc: Lorenzo Pieralisi 
Cc: Andrew Murray 
Cc: Bjorn Helgaas 
Cc: Will Deacon 
Cc: linux-pci@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org

PCI: Add support for root bus sizing

2020-03-30T14:52:34+00:00

In certain cases we should be able to enumerate IO and MEM ranges of all
PCI devices installed in the system, and then set respective host bridge
apertures basing on calculated size and alignment.  Particularly when
firmware is broken and fails to assign bridge windows properly, like on
Alpha UP1500 platform.

Actually, almost everything is already in place, and required changes are
minimal:

- add "size_windows" flag to struct pci_host_bridge: when set, it
  instructs __pci_bus_size_bridges() to continue with the root bus;
- in the __pci_bus_size_bridges() path: add checks for bus->self,
  as it can legitimately be null for the root bus.

Link: https://lore.kernel.org/r/20200314194355.GA12510@mail.rc.ru
Tested-by: Matt Turner 
Signed-off-by: Ivan Kokshaysky 
Signed-off-by: Bjorn Helgaas

PCI: Allow adjust_bridge_window() to shrink resource if necessary

2020-01-29T22:57:28+00:00

Remove checks for resource size in adjust_bridge_window(). This is
necessary to allow pci_bus_distribute_available_resources() to function
when the kernel parameter "pci=hpmemsize=nn[KMG]" is used to allocate
resources. Because the kernel parameter sets the size of all hotplug
bridges to be the same, there are problems when nested hotplug bridges are
encountered. Fitting a downstream hotplug bridge with size X and normal
bridges with non-zero size Y into parent hotplug bridge with size X is
impossible, and hence the downstream hotplug bridge needs to shrink to fit
into its parent.

Add check for if bridge is extended or shrunken and reflect that in the
call to pci_dbg().

Reset the resource if its new size is zero (if we have run out of a bridge
window resource) to prevent the PCI resource assignment code from
attempting to assign a zero-sized resource.

Link: https://lore.kernel.org/r/PSXP216MB0438D3E2CFE64EBAA32AF691803C0@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM
Signed-off-by: Nicholas Johnson 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Mika Westerberg