From e9fe9e188118a0a34c6200d9b10ea6247f53592d Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 9 Jun 2008 16:52:04 -0700 Subject: pnpacpi: fix IRQ flag decoding 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 [rene.herman@keyaccess.nl: fix comment] Signed-off-by: Bjorn Helgaas Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/pnp/pnpacpi/rsparser.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'drivers/pnp/pnpacpi/rsparser.c') diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index 0201c8adfda7..ab09fe6fe1e4 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -56,9 +56,11 @@ static int irq_flags(int triggering, int polarity, int shareable) 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, int *triggering, int *polarity) *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 pnp_dev *dev, 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(struct pnp_dev *dev, 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; -- cgit v1.2.3 From a993273beae8022390e48fe9205480565ad470ab Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 9 Jun 2008 16:52:05 -0700 Subject: pnpacpi: fix shareable IRQ encode/decode When we encode IRQ resources, we should use the "shareable" flag we got from _PRS rather than guessing based on the IRQ trigger mode. This is based on a patch by Tom Jaeger: http://bugzilla.kernel.org/show_bug.cgi?id=9487#c32 Signed-off-by: Bjorn Helgaas Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/pnp/pnpacpi/rsparser.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) (limited to 'drivers/pnp/pnpacpi/rsparser.c') diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index ab09fe6fe1e4..8681ff647201 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -50,14 +50,14 @@ static int irq_flags(int triggering, int polarity, int shareable) flags = IORESOURCE_IRQ_HIGHEDGE; } - if (shareable) + if (shareable == ACPI_SHARED) flags |= IORESOURCE_IRQ_SHAREABLE; return flags; } static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering, - int *polarity) + int *polarity, int *shareable) { switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL | IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) { @@ -84,6 +84,11 @@ static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering, *polarity = ACPI_ACTIVE_HIGH; break; } + + if (flags & IORESOURCE_IRQ_SHAREABLE) + *shareable = ACPI_SHARED; + else + *shareable = ACPI_EXCLUSIVE; } static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev, @@ -796,15 +801,12 @@ static void pnpacpi_encode_irq(struct pnp_dev *dev, struct resource *p) { struct acpi_resource_irq *irq = &resource->data.irq; - int triggering, polarity; + int triggering, polarity, shareable; - decode_irq_flags(dev, p->flags, &triggering, &polarity); + decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); irq->triggering = triggering; irq->polarity = polarity; - if (triggering == ACPI_EDGE_SENSITIVE) - irq->sharable = ACPI_EXCLUSIVE; - else - irq->sharable = ACPI_SHARED; + irq->sharable = shareable; irq->interrupt_count = 1; irq->interrupts[0] = p->start; @@ -819,16 +821,13 @@ static void pnpacpi_encode_ext_irq(struct pnp_dev *dev, struct resource *p) { struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq; - int triggering, polarity; + int triggering, polarity, shareable; - decode_irq_flags(dev, p->flags, &triggering, &polarity); + decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); extended_irq->producer_consumer = ACPI_CONSUMER; extended_irq->triggering = triggering; extended_irq->polarity = polarity; - if (triggering == ACPI_EDGE_SENSITIVE) - extended_irq->sharable = ACPI_EXCLUSIVE; - else - extended_irq->sharable = ACPI_SHARED; + extended_irq->sharable = shareable; extended_irq->interrupt_count = 1; extended_irq->interrupts[0] = p->start; -- cgit v1.2.3 From 36d872a370d3d10e5a7faa9dcacce744260fb13b Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Mon, 9 Jun 2008 16:52:06 -0700 Subject: PNPACPI: use _CRS IRQ descriptor length for _SRS When configuring the resources of an ACPI device, we first evaluate _CRS to get a template of resource descriptors, then fill in the specific resource values we want, and finally evaluate _SRS to actually configure the device. Some resources have optional fields, so the size of encoded descriptors varies depending on the specific values. For example, IRQ descriptors can be either two or three bytes long. The third byte contains triggering information and can be omitted if the IRQ is edge-triggered and active high. The BIOS often assumes that IRQ descriptors in the _SRS buffer use the same format as those in the _CRS buffer, so this patch enforces that constraint. The "Start Dependent Function" descriptor also has an optional byte, but we don't currently encode those descriptors, so I didn't do anything for those. I have tested this patch on a Toshiba Portege 4000. Without the patch, parport_pc claims the parallel port only if I use "pnpacpi=off". This patch makes it work with PNPACPI. This is an extension of a patch by Tom Jaeger: http://bugzilla.kernel.org/show_bug.cgi?id=9487#c42 References: http://bugzilla.kernel.org/show_bug.cgi?id=5832 Enabling ACPI Plug and Play in kernels >2.6.9 kills Parallel support http://bugzilla.kernel.org/show_bug.cgi?id=9487 buggy firmware expects four-byte IRQ resource descriptor (was: Serial port disappears after Suspend on Toshiba R25) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1d5b285da1893b90507b081664ac27f1a8a3dc5b related ACPICA fix Signed-off-by: Bjorn Helgaas Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/pnp/pnpacpi/rsparser.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'drivers/pnp/pnpacpi/rsparser.c') diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index 8681ff647201..46c791adb894 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -755,6 +755,9 @@ static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data) if (pnpacpi_supported_resource(res)) { (*resource)->type = res->type; (*resource)->length = sizeof(struct acpi_resource); + if (res->type == ACPI_RESOURCE_TYPE_IRQ) + (*resource)->data.irq.descriptor_length = + res->data.irq.descriptor_length; (*resource)++; } @@ -810,10 +813,12 @@ static void pnpacpi_encode_irq(struct pnp_dev *dev, irq->interrupt_count = 1; irq->interrupts[0] = p->start; - dev_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start, + dev_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n", + (int) p->start, triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge", polarity == ACPI_ACTIVE_LOW ? "low" : "high", - irq->sharable == ACPI_SHARED ? "shared" : "exclusive"); + irq->sharable == ACPI_SHARED ? "shared" : "exclusive", + irq->descriptor_length); } static void pnpacpi_encode_ext_irq(struct pnp_dev *dev, -- cgit v1.2.3