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ACPI / watchdog: Fix off-by-one error at resource assignment

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The resource allocation in WDAT watchdog has off-one-by error, it sets
one byte more than the actual end address.  This may eventually lead
to unexpected resource conflicts.

Fixes: 058dfc7670 (ACPI / watchdog: Add support for WDAT hardware watchdog)
Cc: 4.9+ <[email protected]> # 4.9+
Signed-off-by: Takashi Iwai <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Takashi Iwai 2018-03-19 14:51:49 +01:00 • committed by Rafael J. Wysocki
commit b1abf6fc49
2 changed files with 3 additions and 3 deletions
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4
drivers/acpi/acpi_watchdog.c
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@ -74,10 +74,10 @@ void __init acpi_watchdog_init(void)
res.start = gas->address;
if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
res.flags = IORESOURCE_MEM;
res.end = res.start + ALIGN(gas->access_width, 4);
res.end = res.start + ALIGN(gas->access_width, 4) - 1;
} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
res.flags = IORESOURCE_IO;
res.end = res.start + gas->access_width;
res.end = res.start + gas->access_width - 1;
} else {
pr_warn("Unsupported address space: %u\n",
gas->space_id);