[PATCH 2/5] platform/x86: dell: dcdbas: Suppress bind attributes of the platform driver

[Rosen Penev <rosenp@gmail.com>]

The dcdbas platform device is created by the module itself and stays
in use for as long as the module is loaded: dell-smbios-smm allocates
its SMI buffers against it through dcdbas_smi_alloc() whether or not
the driver is bound.

Binding the driver again after an unbind also leaks state:
dcdbas_check_wsmt() runs a second time and memremap()s the firmware
SMI buffer again, overwriting bios_buffer and leaking the previous
mapping.

Unbinding or rebinding the device by hand is not useful, so hide the
bind and unbind files.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/platform/x86/dell/dcdbas.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/dell/dcdbas.c b/drivers/platform/x86/dell/dcdbas.c
index a5917093d539..601ee8ca92e4 100644
--- a/drivers/platform/x86/dell/dcdbas.c
+++ b/drivers/platform/x86/dell/dcdbas.c
@@ -708,6 +708,7 @@ static void dcdbas_remove(struct platform_device *dev)
 static struct platform_driver dcdbas_driver = {
 	.driver		= {
 		.name	= DRIVER_NAME,
+		.suppress_bind_attrs = true,
 	},
 	.probe		= dcdbas_probe,
 	.remove		= dcdbas_remove,
-- 
2.56.0