EDAC/ti: Fix handling of platform_get_irq() error

platform_get_irq() returns a negative error number on error. In such a
case, comparison to 0 would pass the check therefore check the return
value properly, whether it is negative.

[ bp: Massage commit message. ]

Fixes: 86a18ee21e5e ("EDAC, ti: Add support for TI keystone and DRA7xx EDAC")
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Borislav Petkov <[e-mail]>
Reviewed-by: Tero Kristo <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]

drivers/edac/ti_edac.c

···
 
 	/* add EMIF ECC error handler */
 	error_irq = platform_get_irq(pdev, 0);
-	if (!error_irq) {
+	if (error_irq < 0) {
+		ret = error_irq;
 		edac_printk(KERN_ERR, EDAC_MOD_NAME,
 			    "EMIF irq number not defined.\n");
 		goto err;