ACPI call output string terminates with the suffix 'lled' that comes from the string 'not called'

[FabriceSalvaire]

How to reproduce:

First add debug in acpi_proc_read:

static ssize_t acpi_proc_read( struct file *filp, char __user *buff,
            size_t count, loff_t *off )
{
    ssize_t ret;
    int len = strlen(result_buffer);

#ifdef DEBUG
    printk(KERN_INFO "acpi_call_read: length %u, '%s'\n", len, result_buffer);
#endif
...

Run:

echo '_SB.PCI0.LPC.EC.HKEY.BCTG 0x1' > /proc/acpi/call ; cat /proc/acpi/call
0x327lled

should return 0x327

dmsg return:
[86483.844220] acpi_call: Calling _SB.PCI0.LPC.EC.HKEY.BCTG
[86483.844768] acpi_call: Call successful: 0x327
[86483.848402] acpi_call_read: length 5, '0x327'
[86483.848439] acpi_call_read: length 10, 'not called'
[86483.848455] acpi_call_read: length 10, 'not called'

It shows acpi_proc_read is called 3 times.

How to fix:
comment line in acpi_proc_read: strcpy(result_buffer, "not called");

I don't understand what happen.

[nuklea]

Approve. Hame same problem.