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path: root/drivers/acpi/sbshc.c
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Diffstat (limited to 'drivers/acpi/sbshc.c')
-rw-r--r--drivers/acpi/sbshc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index ae9a90438e2..a2cf3008ce6 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -117,6 +117,11 @@ static int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol,
int ret = -EFAULT, i;
u8 temp, sz = 0;
+ if (!hc) {
+ printk(KERN_ERR PREFIX "host controller is not configured\n");
+ return ret;
+ }
+
mutex_lock(&hc->lock);
if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))
goto end;
@@ -292,6 +297,7 @@ static int acpi_smbus_hc_remove(struct acpi_device *device, int type)
hc = acpi_driver_data(device);
acpi_ec_remove_query_handler(hc->ec, hc->query_bit);
kfree(hc);
+ acpi_driver_data(device) = NULL;
return 0;
}