libata: more verbose request_irq() failure

Suggested by Jarek P.

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 76b633a2f304..51b3a0ddb238 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -5293,6 +5293,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
         unsigned int count = 0, i;
         struct device *dev = ent->dev;
         struct ata_host_set *host_set;
+        int rc;
 
         DPRINTK("ENTER\n");
         /* alloc a container for our list of ATA ports (buses) */
@@ -5344,9 +5345,13 @@ int ata_device_add(const struct ata_probe_ent *ent)
                 goto err_free_ret;
 
         /* obtain irq, that is shared between channels */
-        if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
-                        DRV_NAME, host_set))
+        rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
+                         DRV_NAME, host_set);
+        if (rc) {
+                dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
+                           ent->irq, rc);
                 goto err_out;
+        }
 
         /* perform each probe synchronously */
         DPRINTK("probe begin\n");