panasonic-laptop: Handle errors properly if they happen
acpi_pcc_retrieve_biosdata() returns success instead of error if
HKEY.SINF is invalid. Fix this.
Furthermore, if acpi_pcc_retrieve_biosdata() returns an error
during device addition, initialization is properly reverted but value
0 is returned, which means success. This would cause a crash when
later using or removing the device, so fix this too.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Harald Welte <laforge@gnumonks.org>
Cc: Bruno Premont <bonbons@linux-vserver.org>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index b3b9e04..96dd341 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -285,6 +285,7 @@
hkey = buffer.pointer;
if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
+ status = AE_ERROR;
goto end;
}
@@ -596,6 +597,7 @@
if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Couldn't retrieve BIOS data\n"));
+ result = -EIO;
goto out_input;
}
/* initialize backlight */