ipc4: remove needless interrupt disabling

ipc4_get_drv() is called from ipc4_get_comp_drv() in IPC context, and
that can run on different cores, so just disabling local interrupts
doesn't provide proper protection. On the other hand IPCs are
serialised, and the global driver list can only be modified from IPC
context, so there is no need to protect it here. Remove the interrupt
lock.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

src/ipc/ipc4/helper.c

@@ -963,14 +963,10 @@ __cold static const struct comp_driver *ipc4_get_drv(const void *uuid)
 	const struct sof_uuid *const __maybe_unused sof_uuid = (const struct sof_uuid *)uuid;
 	struct comp_driver_list *drivers = comp_drivers_get();
 	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,
@@ -980,20 +976,17 @@ __cold static const struct comp_driver *ipc4_get_drv(const void *uuid)
 			       "found type %d, uuid %pU",
 			       info->drv->type,
 			       info->drv->tctx->uuid_p);
-			drv = info->drv;
-			goto out;
+			return info->drv;
 		}
 	}
 
 	tr_warn(&comp_tr,
-		"get_drv(): the provided UUID (%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x) can't be found!",
+		"the provided UUID (%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x) can't be found!",
 		sof_uuid->a, sof_uuid->b, sof_uuid->c, sof_uuid->d[0], sof_uuid->d[1],
 		sof_uuid->d[2], sof_uuid->d[3], sof_uuid->d[4], sof_uuid->d[5], sof_uuid->d[6],
 		sof_uuid->d[7]);
 
-out:
-	irq_local_enable(flags);
-	return drv;
+	return NULL;
 }
 
 /*