remoteproc: stm32_rproc: Fix mailbox interrupts queuing

Manage interrupt coming from coprocessor also when state is
ATTACHED.

Fixes: 35bdafd ("remoteproc: stm32_rproc: Add mutex protection for workqueue")
Cc: [email protected]
Signed-off-by: Gwenael Treuveur <[email protected]>
Acked-by: Arnaud Pouliquen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mathieu Poirier <[email protected]>

Author: Gwenael Treuveur

drivers/remoteproc/stm32_rproc.c

@@ -294,7 +294,7 @@ static void stm32_rproc_mb_vq_work(struct work_struct *work)
 
 	mutex_lock(&rproc->lock);
 
-	if (rproc->state != RPROC_RUNNING)
+	if (rproc->state != RPROC_RUNNING && rproc->state != RPROC_ATTACHED)
 		goto unlock_mutex;
 
 	if (rproc_vq_interrupt(rproc, mb->vq_id) == IRQ_NONE)