linux-toradex.git/kernel/irq/irqdomain.c, branch v3.4.32

irq_domain: fix type mismatch in debugfs output format

2012-04-12T22:25:48+00:00

sizeof(void*) returns an unsigned long, but it was being used as a width parameter to a "%-*s" format string which requires an int.  On 64 bit platforms this causes a type mismatch:

    linux/kernel/irq/irqdomain.c:575: warning: field width should have type
    'int', but argument 6 has type 'long unsigned int'

This change casts the size to an int so printf gets the right data type.

Reported-by: Andreas Schwab 
Signed-off-by: Grant Likely 
Cc: David Daney

irq_domain: Move irq_virq_count into NOMAP revmap

2012-04-12T06:37:48+00:00

This patch replaces the old global setting of irq_virq_count that is only
used by the NOMAP mapping and instead uses a revmap_data property so that
the maximum NOMAP allocation can be set per NOMAP irq_domain.

There is exactly one user of irq_virq_count in-tree right now: PS3.
Also, irq_virq_count is only useful for the NOMAP mapping.  So,
instead of having a single global irq_virq_count values, this change
drops it entirely and added a max_irq argument to irq_domain_add_nomap().
That makes it a property of an individual nomap irq domain instead of
a global system settting.

Signed-off-by: Grant Likely 
Tested-by: Benjamin Herrenschmidt 
Cc: Thomas Gleixner 
Cc: Milton Miller

irqdomain: Fix debugfs formatting

2012-04-11T07:01:45+00:00

This patch fixes the irq_domain_mapping debugfs output to pad pointer
values with leading zeros so that pointer values are displayed
correctly.  Otherwise you get output similar to "0x 5e0000000000000".
Also, when the irq_domain is set to 'null'

Signed-off-by: Grant Likely 
Cc: David Daney 
Cc: Mika Westerberg

irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().

2012-04-11T04:39:16+00:00

In commit 4bbdd45a (irq_domain/powerpc: eliminate irq_map; use
irq_alloc_desc() instead) code was added that ignores error returns
from irq_alloc_desc_from() by (silently) casting the return value to
unsigned.  The negitive value error return now suddenly looks like a
valid irq number.

Commits cc79ca69 (irq_domain: Move irq_domain code from powerpc to
kernel/irq) and 1bc04f2c (irq_domain: Add support for base irq and
hwirq in legacy mappings) move this code to its current location in
irqdomain.c

The result of all of this is a null pointer dereference OOPS if one of
the error cases is hit.

The fix: Don't cast away the negativeness of the return value and then
check for errors.

Signed-off-by: David Daney 
Acked-by: Rob Herring 
[grant.likely: dropped addition of new 'irq' variable]
Signed-off-by: Grant Likely

irqdomain: Remove powerpc dependency from debugfs file

2012-03-29T20:31:02+00:00

The debugfs code is really generic for all platforms.  This patch removes the
powerpc-specific directory reference and makes it available to all
architectures.

Signed-off-by: Grant Likely

irq_domain/mips: Allow irq_domain on MIPS

2012-02-24T16:47:23+00:00

This patch makes IRQ_DOMAIN usable on MIPS.  It uses an ugly workaround
to preserve current behaviour so that MIPS has time to add irq_domain
registration to the irq controller drivers.  The workaround will be
removed in Linux v3.6

Signed-off-by: Grant Likely 
Cc: Ralf Baechle 
Cc: Rob Herring 
Cc: Thomas Gleixner 
Cc: linux-mips@linux-mips.org

irq_domain: constify irq_domain_ops

2012-02-16T13:11:24+00:00

Make irq_domain_ops pointer a constant to make it safer for multiple
instances to share the same ops pointer and change the irq_domain code
so that it does not modify the ops.

v4: Fix mismatched type reference in powerpc code

Signed-off-by: Grant Likely 
Cc: Thomas Gleixner 
Cc: Benjamin Herrenschmidt 
Cc: Milton Miller 
Tested-by: Olof Johansson

irq_domain: Create common xlate functions that device drivers can use

2012-02-16T13:11:23+00:00

Rather than having each interrupt controller driver creating its own barely
unique .xlate function for irq_domain, create a library of translators which
any driver can use directly.

v5: - Remove irq_domain_xlate_pci().  It was incorrect.

Signed-off-by: Grant Likely 
Cc: Rob Herring 
Cc: Benjamin Herrenschmidt 
Cc: Mark Salter 
Cc: Thomas Gleixner 
Cc: Milton Miller 
Tested-by: Olof Johansson

irq_domain: Remove irq_domain_add_simple()

2012-02-16T13:11:23+00:00

irq_domain_add_simple() was a stop-gap measure until complete irq_domain
support was complete.  This patch removes the irq_domain_add_simple()
interface.

This patch also drops the explicit irq_domain initialization performed
by the mach-versatile code because the versatile interrupt controller
already has irq_domain support built into it.  This was a bug that was
hanging around quietly for a while, but with the full irq_domain which
actually verifies that irq_domain ranges are available it would cause
the registration to fail and the system wouldn't boot.

v4: Fixed number of irqs in mx5 gpio code
v2: Updated to pass in host_data pointer on irq_domain allocation.

Signed-off-by: Grant Likely 
Cc: Rob Herring 
Cc: Thomas Gleixner 
Cc: Milton Miller 
Cc: Russell King 
Tested-by: Olof Johansson

irq_domain: Remove 'new' irq_domain in favour of the ppc one

2012-02-16T13:11:23+00:00

This patch removes the simplistic implementation of irq_domains and enables
the powerpc infrastructure for all irq_domain users.  The powerpc
infrastructure includes support for complex mappings between Linux and
hardware irq numbers, and can manage allocation of irq_descs.

This patch also converts the few users of irq_domain_add()/irq_domain_del()
to call irq_domain_add_legacy() instead.

v3: Fix bug that set up too many irqs in translation range.
v2: Fix removal of irq_alloc_descs() call in gic driver

Signed-off-by: Grant Likely 
Cc: Rob Herring 
Cc: Benjamin Herrenschmidt 
Cc: Thomas Gleixner 
Cc: Milton Miller 
Tested-by: Olof Johansson