From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
The code as currently implemented does not work on big endian systems,
so fix it up.
Fixes: a2c8f92bea5f ("ACPI: CPPC: Implement support for SystemIO registers")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/linux-acpi/20220111092928.GA24968@kili/
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/cppc_acpi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
Index: linux-pm/drivers/acpi/cppc_acpi.c
===================================================================
--- linux-pm.orig/drivers/acpi/cppc_acpi.c
+++ linux-pm/drivers/acpi/cppc_acpi.c
@@ -929,16 +929,18 @@ static int cpc_read(int cpu, struct cpc_
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
u32 width = 8 << (reg->access_width - 1);
+ u32 val_u32;
acpi_status status;
status = acpi_os_read_port((acpi_io_address)reg->address,
- (u32 *)val, width);
+ &val_u32, width);
if (ACPI_FAILURE(status)) {
pr_debug("Error: Failed to read SystemIO port %llx\n",
reg->address);
return -EFAULT;
}
+ *val = val_u32;
return 0;
} else if (reg->space_id == ACPI_ADR_SPACE_PLATFORM_COMM && pcc_ss_id >= 0)
vaddr = GET_PCC_VADDR(reg->address, pcc_ss_id);
