please use the patch from Tero Roponen.
This patch fixes the crash I experienced in 2.6.29-rc2.
Tested on ASUS M50vm.
Signed-off-by: Tero Roponen <tero.roponen@xxxxxxxxx>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index a2b82c9..5c2f5d3 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -982,7 +982,7 @@ int __init acpi_ec_ecdt_probe(void)
saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!saved_ec)
return -ENOMEM;
- memcpy(&saved_ec, boot_ec, sizeof(saved_ec));
+ memcpy(saved_ec, boot_ec, sizeof(*saved_ec));
/* fall through */
}
/* This workaround is needed only on some broken machines,
sorry for screw up...
Alex
Peter Klotz wrote:
On bootup of 2.6.29-rc2 a kernel panic in acpi_ns_get_parent_node occurs.
This is the backtrace (written down from the screen, maybe incomplete):
acpi_ev_execute_reg_methods
acpi_install_address_space_handler
acpi_ec_space_handler
acpi_init
ec_install_handlers
acpi_ec_ecdt_probe
acpi_init
fbmem_init
_stext
register_irq_proc
proc_pident_readdir
kernel_init
child_rip
kernel_init
child_rip
RIP [...] acpi_ns_get_parent_node
I can provide a screenshot (270kB) if this information is insufficient.
The system booted with 2.6.29-rc1 so a recent change must be the cause
of this panic.
The system is an Asus B50A laptop running an x86_64 kernel.
Maybe this problem is related to these messages I was seeing in
bootups of previous kernels:
[ 0.176398] ACPI Error (nsaccess-0434): ACPI path has too many
parent prefixes (^) - reached beyond root node [20080926]
Regards, Peter.
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