linux-toradex.git/include/linux/pnp.h, branch v2.6.25.2

pnp: increase number of devices supported per protocol

2008-04-11T15:06:44+00:00

Increase the PNP "number of devices" limit.  We currently use an unsigned
char, which limits us to 256 devices per protocol.  This patch changes that to
an unsigned int.

Not all backends can take advantage of this: we limit ISAPNP to 10 devices in
isapnp_cfg_begin(), and PNPBIOS is limited to 256 devices because the BIOS
interfaces use a one-byte device node number.

But there is no limit on the number of PNPACPI devices we may have.  Large HP
Integrity machines have more than 256, which causes the current "unsigned char
number" to wrap around.  This causes errors like this:

    pnp: PnP ACPI init
    kobject_add failed for 00:00 with -EEXIST, don't try to register things with the same name in the same directory.

    Call Trace:
     [] show_stack+0x40/0xa0
     [] dump_stack+0x30/0x60
     [] kobject_add+0x290/0x2c0
     [] device_add+0x160/0x860
     [] device_register+0x30/0x60
     [] __pnp_add_device+0x130/0x180
     [] pnp_add_device+0xb0/0xe0
     [] pnpacpi_add_device+0x510/0x5a0
     [] pnpacpi_add_device_handler+0x50/0x80

This patch increases the limit to fix this PNPACPI problem.  It should not
have any adverse effect on ISAPNP or PNPBIOS because their limits are still
enforced in the backends.

Signed-off-by: Bjorn Helgaas 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

PNP: increase the number of PnP memory resources from 12 to 24

2008-03-23T00:00:57+00:00

Increase the number of PnP memory resources from 12 to 24.

This removes an "exceeded the max num of mem resources" warning on boot. I
also noticed the reservation of two more iomem ranges on the computer on
which this was tested.

Signed-off-by: Darren Salt 
Signed-off-by: Ingo Molnar 
Acked-by: Bjorn Helgaas 
Signed-off-by: Linus Torvalds

isapnp driver semaphore to mutex

2008-02-06T18:41:20+00:00

Changed the isapnp semaphore to a mutex.

[akpm@linux-foundation.org: no externs-in-c]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Daniel Walker 
Cc: Bjorn Helgaas 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

include/linux/: Spelling fixes

2008-02-03T15:45:46+00:00

Signed-off-by: Joe Perches 
Signed-off-by: Adrian Bunk

increase PNP_MAX_PORT to 40 from 24

2007-12-28T04:55:13+00:00

a7839e960675b549f06209d18283d5cee2ce9261
(PNP: increase the maximum number of resources)
increased PNP_MAX_PORT to 24 from 8.
It also added a test and a complaint when a
machine exceeded the limit, causing:

pnpacpi: exceeded the max number of IO resources: 24

http://bugzilla.kernel.org/show_bug.cgi?id=9535

We should have been squawking about this all along,
as this is a potentially serious issue.

For now, simply burn some dynamic bytes and
increase the limit by another 16 to 40.
There is no guarantee that this will satisfy
every system on Earth.  It probably will not,
but it should be an improvement.

In the future, PNPACPI should allocate resource
structures as needed, rather than max-sized arrays.

Signed-off-by: Len Brown

PNP: increase the maximum number of resources

2007-11-29T17:24:52+00:00

On some systems the number of resources(IO,MEM) returnedy by PNP device is
greater than the PNP constant, for example motherboard devices.  It brings
that some resources can't be reserved and resource confilicts.  This will
cause PCI resources are assigned wrongly in some systems, and cause hang.
This is a regression since we deleted ACPI motherboard driver and use PNP
system driver.

[akpm@linux-foundation.org: fix text and coding-style a bit]
Signed-off-by: Li Shaohua 
Signed-off-by: Zhao Yakui 
Cc: Bjorn Helgaas 
Cc: Thomas Renninger 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

PNP: remove null pointer checks

2007-10-17T15:43:04+00:00

Remove some null pointer checks.  Null pointers in these areas indicate
programming errors, and I think it's better to oops immediately rather than
return an error that is easily ignored.

Signed-off-by: Bjorn Helgaas 
Cc: Adam Belay 
Cc: Len Brown 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

PNP: fix up after Lindent

2007-07-26T18:35:21+00:00

These are manual fixups after running Lindent.  No functional change.

Signed-off-by: Bjorn Helgaas 
Cc: Len Brown 
Cc: Adam Belay 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

PNP: Lindent all source files

2007-07-26T18:35:20+00:00

Run Lindent on all PNP source files.

Produced by:

    $ quilt new pnp-lindent
    $ find drivers/pnp -name \*.[ch] | xargs quilt add
    $ quilt add include/linux/{pnp.h,pnpbios.h}
    $ scripts/Lindent drivers/pnp/*.c drivers/pnp/*/*.c include/linux/pnp*.h
    $ quilt refresh --sort

Signed-off-by: Bjorn Helgaas 
Cc: Len Brown 
Cc: Adam Belay 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ACPI, PNP: hook ACPI D-state to PNP suspend/resume

2007-07-22T08:18:20+00:00

applied after Rafel's 'PM: Update global suspend and hibernation operations framework' patch set

Signed-off-by: Shaohua Li 
Signed-off-by: Len Brown