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| author | Zhang Rui <rui.zhang@intel.com> | 2014-03-11 22:40:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-23 21:38:22 -0700 |
| commit | ae59ae911d2c14cf23843b9f12a935610c9c3db1 (patch) | |
| tree | 95aac2c8033f4e42a112935efded126f0ebbb1e7 | |
| parent | 0bf95498441319bcdba6fc4d8307091cd66bfc5e (diff) | |
| download | lwn-ae59ae911d2c14cf23843b9f12a935610c9c3db1.tar.gz lwn-ae59ae911d2c14cf23843b9f12a935610c9c3db1.zip | |
PNP / ACPI: proper handling of ACPI IO/Memory resource parsing failures
commit 89935315f192abf7068d0044cefc84f162c3c81f upstream.
Before commit b355cee88e3b (ACPI / resources: ignore invalid ACPI
device resources), if acpi_dev_resource_memory()/acpi_dev_resource_io()
returns false, it means the the resource is not a memeory/IO resource.
But after commit b355cee88e3b, those functions return false if the
given memory/IO resource entry is invalid (the length of the resource
is zero).
This breaks pnpacpi_allocated_resource(), because it now recognizes
the invalid memory/io resources as resources of unknown type. Thus
users see confusing warning messages on machines with zero length
ACPI memory/IO resources.
Fix the problem by rearranging pnpacpi_allocated_resource() so that
it calls acpi_dev_resource_memory() for memory type and IO type
resources only, respectively.
Fixes: b355cee88e3b (ACPI / resources: ignore invalid ACPI device resources)
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reported-and-tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-and-tested-by: Julian Wollrath <jwollrath@web.de>
Reported-and-tested-by: Paul Bolle <pebolle@tiscali.nl>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/pnp/pnpacpi/rsparser.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index 9847ab163829..a8b7466196ee 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -183,9 +183,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res, struct resource r; int i, flags; - if (acpi_dev_resource_memory(res, &r) - || acpi_dev_resource_io(res, &r) - || acpi_dev_resource_address_space(res, &r) + if (acpi_dev_resource_address_space(res, &r) || acpi_dev_resource_ext_address_space(res, &r)) { pnp_add_resource(dev, &r); return AE_OK; @@ -217,6 +215,17 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res, } switch (res->type) { + case ACPI_RESOURCE_TYPE_MEMORY24: + case ACPI_RESOURCE_TYPE_MEMORY32: + case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: + if (acpi_dev_resource_memory(res, &r)) + pnp_add_resource(dev, &r); + break; + case ACPI_RESOURCE_TYPE_IO: + case ACPI_RESOURCE_TYPE_FIXED_IO: + if (acpi_dev_resource_io(res, &r)) + pnp_add_resource(dev, &r); + break; case ACPI_RESOURCE_TYPE_DMA: dma = &res->data.dma; if (dma->channel_count > 0 && dma->channels[0] != (u8) -1) |