From: Alexey Starikovskiy <astarikovskiy@suse.de>
Date: Tue, 18 Mar 2008 02:37:42 +0000 (-0400)
Subject: ACPI: battery: Don't return -EFAIL on broken packages.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b8a1bdb14940946fcf0438a6337b2a6c54294fb8;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ACPI: battery: Don't return -EFAIL on broken packages.

Acer BIOS has a bug which is exposed when a dead battery is present.

The package template that is used to describe battery status is
over-written with sane values when the battery is live.
But when the batter is dead, a bogus reference in the template
is used.  In this case, Linux returns a fault, when instead
it should simply return that it doesn't know the missing value.

http://bugzilla.kernel.org/show_bug.cgi?id=8573
http://bugzilla.kernel.org/show_bug.cgi?id=10202

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index f6215e809808..d5729d5dc190 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -293,13 +293,12 @@ static int extract_package(struct acpi_battery *battery,
 				strncpy(ptr, (u8 *)&element->integer.value,
 					sizeof(acpi_integer));
 				ptr[sizeof(acpi_integer)] = 0;
-			} else return -EFAULT;
+			} else
+				*ptr = 0; /* don't have value */
 		} else {
-			if (element->type == ACPI_TYPE_INTEGER) {
-				int *x = (int *)((u8 *)battery +
-						offsets[i].offset);
-				*x = element->integer.value;
-			} else return -EFAULT;
+			int *x = (int *)((u8 *)battery + offsets[i].offset);
+			*x = (element->type == ACPI_TYPE_INTEGER) ?
+				element->integer.value : -1;
 		}
 	}
 	return 0;