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ACPI: resource: Fix memory resource type union access

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[ Upstream commit 7899ca9f3b ]

In acpi_decode_space() addr->info.mem.caching is checked on main level
for any resource type but addr->info.mem is part of union and thus
valid only if the resource type is memory range.

Move the check inside the preceeding switch/case to only execute it
when the union is of correct type.

Fixes: fcb29bbcd5 ("ACPI: Add prefetch decoding to the address space parser")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20241202100614.20731-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ilpo Järvinen 2024-12-02 12:06:13 +02:00 committed by Greg Kroah-Hartman
parent 9f82e8ace7
commit 78079fda48
1 changed files with 3 additions and 3 deletions
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6
drivers/acpi/resource.c
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@ -250,6 +250,9 @@ static bool acpi_decode_space(struct resource_win *win,
switch (addr->resource_type) {
case ACPI_MEMORY_RANGE:
acpi_dev_memresource_flags(res, len, wp);
if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
res->flags |= IORESOURCE_PREFETCH;
break;
case ACPI_IO_RANGE:
acpi_dev_ioresource_flags(res, len, iodec,
@ -265,9 +268,6 @@ static bool acpi_decode_space(struct resource_win *win,
if (addr->producer_consumer == ACPI_PRODUCER)
res->flags |= IORESOURCE_WINDOW;
if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
res->flags |= IORESOURCE_PREFETCH;
return !(res->flags & IORESOURCE_DISABLED);
}