libata: more verbose request_irq() failure

Suggested by Jarek P.

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 76b633a2f304f266faa33fb37f4e6f36255b824a..51b3a0ddb238b01a81ab293829f8cf4f0a1e3656 100644 (file)
--- 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");