1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ec3ce120a517..89fd0e9ed746 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7178,6 +7178,10 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
  *      request IRQ and register it.  This helper takes necessasry
  *      arguments and performs the three steps in one go.
  *
+ *      An invalid IRQ skips the IRQ registration and expects the host to
+ *      have set polling mode on the port. In this case, @irq_handler
+ *      should be NULL.
+ *
  *      LOCKING:
  *      Inherited from calling layer (may sleep).
  *
@@ -7194,6 +7198,12 @@ int ata_host_activate(struct ata_host *host, int irq,
         if (rc)
                 return rc;
 
+        /* Special case for polling mode */
+        if (!irq) {
+                WARN_ON(irq_handler);
+                return ata_host_register(host, sht);
+        }
+
         rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
                               dev_driver_string(host->dev), host);
         if (rc)