Re: [2.624-rc1 regression] lost battery information

Andrey Borzenkov
2007-10-27T07:22:55Z

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On Friday 26 October 2007, Alexey Starikovskiy wrote:
>
> Your cat's "Bad address" means -EFAULT, according to "man errno".
> Please apply this patch to see what exactly failed...

[ 1191.471572] ACPI: element[12]->type = 1, expected string
[ 1196.640065] ACPI: element[12]->type = 1, expected string
[ 1199.479773] ACPI: element[12]->type = 1, expected string
[ 1199.745435] ACPI: element[12]->type = 1, expected string

it is "OEM type". For reference here is _BIF from my DSDT:

Method (_BIF, 0, NotSerialized)
{
Name (BUFF, Package (0x0D) {})
Store (0x00, Index (BUFF, 0x00))
Store (\_SB.MEM.BDV2, Local2)
Multiply (\_SB.MEM.BDC2, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x01))
Multiply (\_SB.MEM.BLF2, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x02))
Store (\_SB.MEM.BTC2, Index (BUFF, 0x03))
Store (\_SB.MEM.BDV2, Index (BUFF, 0x04))
Multiply (\_SB.MEM.BCW2, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x05))
Multiply (\_SB.MEM.BCL2, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x06))
Multiply (\_SB.MEM.BG12, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x07))
Multiply (\_SB.MEM.BG22, Local2, Local0)
Divide (Local0, 0x03E8, Local1, Local0)
Store (Local0, Index (BUFF, 0x08))
Store (\_SB.MEM.BMN2, Index (BUFF, 0x09))
Store (\_SB.MEM.BSN2, Index (BUFF, 0x0A))
Store (\_SB.MEM.BTP2, Index (BUFF, 0x0B))
Store (\_SB.MEM.BOI2, Index (BUFF, 0x0C))
Return (BUFF)
}

This is behaviour change. Previous battery.c used generic acpi_extract_package
which allowed (allows) for object of type integer when string is requested:

case ACPI_TYPE_INTEGER:
switch (format_string[i]) {
case 'N':
size_required += sizeof(acpi_integer);
tail_offset += sizeof(acpi_integer);
break;
case 'S':
size_required +=
sizeof(char *) + sizeof(acpi_integer) +
sizeof(char);
tail_offset += sizeof(char *);
break;

while current battery.c:extract_package fails:

if (offsets[i].mode) {
if (element->type != ACPI_TYPE_STRING &&
element->type != ACPI_TYPE_BUFFER) {
printk (KERN_ERR PREFIX "element[%d]->type = %x, expected string\n", i,
element->type);
return -EFAULT;
}

well, while it could be BIOS fault this happily worked before ... This is
obviously also the reason why I do not have anything in /sys

Fans, could you check whether you have the same issue using test patch?

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