diff options
| -rw-r--r-- | drivers/mailbox/pcc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index 82102a4c5d68..8fd4d0f79b09 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -333,10 +333,16 @@ static irqreturn_t pcc_mbox_irq(int irq, void *p) if (pcc_chan_reg_read_modify_write(&pchan->plat_irq_ack)) return IRQ_NONE; + /* + * Clear this flag after updating interrupt ack register and just + * before mbox_chan_received_data() which might call pcc_send_data() + * where the flag is set again to start new transfer. This is + * required to avoid any possible race in updatation of this flag. + */ + pchan->chan_in_use = false; mbox_chan_received_data(chan, NULL); check_and_ack(pchan, chan); - pchan->chan_in_use = false; return IRQ_HANDLED; } |