Re: [linux-yocto] [4.12][PATCH] ACPI / watchdog: Fix off-by-one error at resource assignment
merged. Bruce On 05/08/2018 05:30 AM, Liwei Song wrote: From: Takashi Iwaicommit b1abf6fc49829d89660c961fafe3f90f3d843c55 upstream. 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: 058dfc767008 (ACPI / watchdog: Add support for WDAT hardware watchdog) Cc: 4.9+ # 4.9+ Signed-off-by: Takashi Iwai Acked-by: Mika Westerberg Acked-by: Guenter Roeck Signed-off-by: Rafael J. Wysocki Signed-off-by: Liwei Song --- drivers/acpi/acpi_watchdog.c | 4 ++-- drivers/watchdog/wdat_wdt.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/acpi_watchdog.c b/drivers/acpi/acpi_watchdog.c index 8c4e0a18460a..87648aa645ba 100644 --- a/drivers/acpi/acpi_watchdog.c +++ b/drivers/acpi/acpi_watchdog.c @@ -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); diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 6d1fbda0f461..0da9943d405f 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -392,7 +392,7 @@ static int wdat_wdt_probe(struct platform_device *pdev) memset(, 0, sizeof(r)); r.start = gas->address; - r.end = r.start + gas->access_width; + r.end = r.start + gas->access_width - 1; if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { r.flags = IORESOURCE_MEM; } else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { -- ___ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto
[linux-yocto] [4.12][PATCH] ACPI / watchdog: Fix off-by-one error at resource assignment
From: Takashi Iwaicommit b1abf6fc49829d89660c961fafe3f90f3d843c55 upstream. 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: 058dfc767008 (ACPI / watchdog: Add support for WDAT hardware watchdog) Cc: 4.9+ # 4.9+ Signed-off-by: Takashi Iwai Acked-by: Mika Westerberg Acked-by: Guenter Roeck Signed-off-by: Rafael J. Wysocki Signed-off-by: Liwei Song --- drivers/acpi/acpi_watchdog.c | 4 ++-- drivers/watchdog/wdat_wdt.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/acpi_watchdog.c b/drivers/acpi/acpi_watchdog.c index 8c4e0a18460a..87648aa645ba 100644 --- a/drivers/acpi/acpi_watchdog.c +++ b/drivers/acpi/acpi_watchdog.c @@ -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); diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 6d1fbda0f461..0da9943d405f 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -392,7 +392,7 @@ static int wdat_wdt_probe(struct platform_device *pdev) memset(, 0, sizeof(r)); r.start = gas->address; - r.end = r.start + gas->access_width; + r.end = r.start + gas->access_width - 1; if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) { r.flags = IORESOURCE_MEM; } else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { -- 2.7.4 -- ___ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto