The patch titled
pnpacpi: fix IRQ flag decoding
has been added to the -mm tree. Its filename is
pnpacpi-fix-irq-flag-decoding.patch
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------------------------------------------------------
Subject: pnpacpi: fix IRQ flag decoding
From: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
When decoding IRQ trigger mode and polarity, it is not enough to mask by
IORESOURCE_BITS because there are now additional bits defined. For
example, if IORESOURCE_IRQ_SHAREABLE was set, we failed to set *triggering
and *polarity at all.
I can't point to a failure that this patch fixes, but
bugs in this area have caused problems when resuming after
suspend, for example:
http://bugzilla.kernel.org/show_bug.cgi?id=6316
http://bugzilla.kernel.org/show_bug.cgi?id=9487
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/152187
This is based on a patch by Tom Jaeger:
http://bugzilla.kernel.org/show_bug.cgi?id=9487#c32
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
Cc: Tom Jaeger <ThJaeger@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pnp/pnpacpi/rsparser.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff -puN drivers/pnp/pnpacpi/rsparser.c~pnpacpi-fix-irq-flag-decoding drivers/pnp/pnpacpi/rsparser.c
--- a/drivers/pnp/pnpacpi/rsparser.c~pnpacpi-fix-irq-flag-decoding
+++ a/drivers/pnp/pnpacpi/rsparser.c
@@ -56,9 +56,11 @@ static int irq_flags(int triggering, int
return flags;
}
-static void decode_irq_flags(int flag, int *triggering, int *polarity)
+static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
+ int *polarity)
{
- switch (flag) {
+ switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
+ IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) {
case IORESOURCE_IRQ_LOWLEVEL:
*triggering = ACPI_LEVEL_SENSITIVE;
*polarity = ACPI_ACTIVE_LOW;
@@ -75,6 +77,12 @@ static void decode_irq_flags(int flag, i
*triggering = ACPI_EDGE_SENSITIVE;
*polarity = ACPI_ACTIVE_HIGH;
break;
+ default:
+ dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
+ flags);
+ *triggering = ACPI_EDGE_SENSITIVE;
+ *polarity = ACPI_ACTIVE_HIGH;
+ break;
}
}
@@ -790,7 +798,7 @@ static void pnpacpi_encode_irq(struct pn
struct acpi_resource_irq *irq = &resource->data.irq;
int triggering, polarity;
- decode_irq_flags(p->flags & IORESOURCE_BITS, &triggering, &polarity);
+ decode_irq_flags(dev, p->flags, &triggering, &polarity);
irq->triggering = triggering;
irq->polarity = polarity;
if (triggering == ACPI_EDGE_SENSITIVE)
@@ -813,7 +821,7 @@ static void pnpacpi_encode_ext_irq(struc
struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
int triggering, polarity;
- decode_irq_flags(p->flags & IORESOURCE_BITS, &triggering, &polarity);
+ decode_irq_flags(dev, p->flags, &triggering, &polarity);
extended_irq->producer_consumer = ACPI_CONSUMER;
extended_irq->triggering = triggering;
extended_irq->polarity = polarity;
_
Patches currently in -mm which might be from bjorn.helgaas@xxxxxx are
acpi_pm_device_sleep_state-cleanup.patch
acpi-fix-drivers-acpi-gluec-build-error.patch
mm-only-enforce-acpi-resource-conflict-checks.patch
3c515-fix-using-pnp_get_resource-when-config_isapnp=n.patch
provide-rtc_cmos-platform-device-take-2.patch
pnpacpi-fix-irq-flag-decoding.patch
pnpacpi-fix-shareable-irq-encode-decode.patch
pnp-add-detail-to-debug-resource-dump.patch
pnp-remove-pnp_resourceindex.patch
pnp-add-pnp_resource_type-internal-interface.patch
pnp-add-pnp_resource_type_name-helper-function.patch
pnp-make-pnp_portmemetc_start-et-al-work-for-invalid-resources.patch
pnp-replace-pnp_resource_table-with-dynamically-allocated-resources.patch
pnp-remove-ratelimit-on-add-resource-failures.patch
pnp-dont-sort-by-type-in-sys-resources.patch
make-pnp_add_card_id-static.patch
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