The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to request_irq() (which takes
*unsigned* IRQ #s), causing it to fail with -EINVAL (overridden by -ENODEV
further below).  Stop  calling request_irq() with the invalid IRQ #s.

Fixes: c27d85f3f3c5 ("[SCSI] SNI RM 53c710 driver")
Signed-off-by: Sergey Shtylyov <redacted>

---
Changes in version 3:
- fixed up the patch summary.

Changes in version 2:
- new patch.

 drivers/scsi/sni_53c710.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: scsi/drivers/scsi/sni_53c710.c
===================================================================

--- scsi.orig/drivers/scsi/sni_53c710.c
+++ scsi/drivers/scsi/sni_53c710.c

@@ -58,6 +58,7 @@ static int snirm710_probe(struct platfor
 	struct NCR_700_Host_Parameters *hostdata;
 	struct Scsi_Host *host;
 	struct  resource *res;
+	int rc;
 
 	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	if (!res)

@@ -83,7 +84,9 @@ static int snirm710_probe(struct platfor
 		goto out_kfree;
 	host->this_id = 7;
 	host->base = base;
-	host->irq = platform_get_irq(dev, 0);
+	host->irq = rc = platform_get_irq(dev, 0);
+	if (rc < 0)
+		goto out_put_host;
 	if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
 		printk(KERN_ERR "snirm710: request_irq failed!\n");
 		goto out_put_host;