ipc: ipc4: helper: drop redundant locking in ipc4_search_for_drv()

Drop the IRQ disable/enable in ipc4_search_for_drv(). The driver
list is only modified at FW boot and when a new driver is registered
at runtime via SOF_IPC4_GLB_LOAD_LIBRARY IPC. ipc4_search_for_drv()
is only used when processing IPC messages. As IPC processing
is serialized, it is not possible for the driver list to be modified
concurrently with a call to ipc4_search_for_drv().

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Author: kv2019i

src/ipc/ipc4/helper.c

@@ -1142,12 +1142,9 @@ __cold static const struct comp_driver *ipc4_search_for_drv(const void *uuid)
 	struct list_item *clist;
 	const struct comp_driver *drv = NULL;
 	struct comp_driver_info *info;
-	uint32_t flags;
 
 	assert_can_be_cold();
 
-	irq_local_disable(flags);
-
 	/* search driver list with UUID */
 	list_for_item(clist, &drivers->list) {
 		info = container_of(clist, struct comp_driver_info,
@@ -1162,7 +1159,6 @@ __cold static const struct comp_driver *ipc4_search_for_drv(const void *uuid)
 		}
 	}
 
-	irq_local_enable(flags);
 	return drv;
 }