diff mbox series

[1/2] platform/x86: ISST: Reset default callback on unregister

Message ID 20230612224033.2382527-2-srinivas.pandruvada@linux.intel.com
State New
Headers
Series TPMI updates for SST |

Commit Message

srinivas pandruvada June 12, 2023, 10:40 p.m. UTC 
  When multiple clients are registered and some of those modules are
removed, the default IOCTL callback for those clients are still not
NULL. Calling them will result in crash.

Set the default IOCTL callback pointer to NULL on unregister.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/platform/x86/intel/speed_select_if/isst_if_common.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c
index e0572a29212e..352bf5118d17 100644
--- a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c
+++ b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c
@@ -831,6 +831,7 @@  void isst_if_cdev_unregister(int device_type)
 {
 	isst_misc_unreg();
 	mutex_lock(&punit_misc_dev_open_lock);
+	punit_callbacks[device_type].def_ioctl = NULL;
 	punit_callbacks[device_type].registered = 0;
 	if (device_type == ISST_IF_DEV_MBOX)
 		isst_delete_hash();