linux-toradex.git/drivers/pci/hotplug/pciehp_ctrl.c, branch v2.6.20.21

pciehp: Remove unnecessary check in pciehp_ctrl.c

2006-10-18T18:36:10+00:00

this was spotted by coverity (cid #819). We dereference p_slot
earlier in the function, and i found no way it could become NULL
anywhere.

Signed-off-by: Eric Sesterhenn 
Signed-off-by: Greg Kroah-Hartman

pciehp - add missing locking

2006-10-18T18:36:10+00:00

This patch fixes the problem that system will panic if multiple power
on/off operations are issued to the same slot in parallel. This
problem can be easily reproduced by commands below.

    # while true; do echo 1 > power; echo 0 > power; done &
    # while true; do echo 1 > power; echo 0 > power; done &

The cause is lack of locking for enable/disable operations. This patch
fixes this problem.

Signed-off-by: Kenji Kaneshige 
Signed-off-by: Kristen Carlson Accardi 
Signed-off-by: Greg Kroah-Hartman

pciehp: fix improper info messages

2006-10-18T18:36:10+00:00

The slot number displayed in info messages would cause a confusion
because those are displayed in several ways (decimal and hex).
Furthermore, those slot number is not same as slot name (directory
name). This patch fixes those improper info messages.

Signed-off-by: Kenji Kaneshige 
Signed-off-by: Kristen Carlson Accardi 
Signed-off-by: Greg Kroah-Hartman

pciehp - fix wrong return value

2006-09-27T00:43:54+00:00

This patch fixes the problem that trying to enable already enabled
slot disables the slot by returning the proper value from
pciehp_enable_slot()/pciehp_disable_slot().

Signed-off-by: Kenji Kaneshige 
Signed-off-by: Kristen Carlson Accardi 
Signed-off-by: Greg Kroah-Hartman

[PATCH] PCI hotplug: convert semaphores to mutex

2006-03-23T22:35:10+00:00

semaphore to mutex conversion.

the conversion was generated via scripts, and the result was validated
automatically via a script as well.

build tested with allyesconfig.

Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

[PATCH] PCI Express Hotplug: clear sticky power-fault bit

2005-11-24T07:04:27+00:00

Per the PCI Express spec, the power-fault-detected bit in the
slot status register can be set anytime hardware detects a power
fault, regardless of whether the slot has a device populated in
it or not. This bit is sticky and must be explicitly cleared.
This patch is needed to allow hot-add after such a power fault
has been detected.

Signed-off-by: Rajesh Shah 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Linus Torvalds

[PATCH] pciehp: reduce debug message verbosity

2005-11-11T00:09:15+00:00

Reduce the number of debug messages generated if pciehp debug is
enabled. I tried to restrict this to removing debug messages that
are either early-driver-debug type messages, or print information
that can be inferred through other debug prints.

Signed-off-by: Rajesh Shah 
Signed-off-by: Greg Kroah-Hartman

[PATCH] pciehp: miscellaneous cleanups

2005-11-11T00:09:15+00:00

Remove un-necessary header includes, remove dead code, remove
some hardcoded constants...

Signed-off-by: Rajesh Shah 
Signed-off-by: Greg Kroah-Hartman

[PATCH] pciehp: remove redundant data structures

2005-11-11T00:09:14+00:00

State information is currently stored in per-slot as well as
per-pci-function data structures in pciehp. There's a lot of
overlap in the information kept, and some of it is never used.
This patch consolidates the state information to per-slot and
eliminates unused data structures. The biggest change is to
eliminate the pci_func structure and the code around managing
its lists.

Signed-off-by: Rajesh Shah 
Signed-off-by: Greg Kroah-Hartman

[PATCH] pciehp: reduce dependence on ACPI

2005-11-11T00:09:14+00:00

Reduce the PCI Express hotplug driver's dependence on ACPI.
We don't walk the acpi namespace anymore to build a list of
bridges and devices. We go to ACPI only to run the _OSC or
_OSHP methods to transition control of hotplug hardware from
system BIOS to the hotplug driver, and to run the _HPP
method to get hotplug device parameters like cache line size,
latency timer and SERR/PERR enable from BIOS.

Note that one of the side effects of this patch is that pciehp
does not automatically enable the hot-added device or its DMA
bus mastering capability now. It expects the device driver to
do that. This may break some drivers and we will have to fix
them as they are reported.

Signed-off-by: Rajesh Shah 
Signed-off-by: Greg Kroah-Hartman