[patch] paride: fix a return in pd_detect()

[Dan Carpenter]

In this function returning non-zero means the hardware was detected and
zero means it wasn't.  This is a failure path so we should return zero.

Fixes: 9f4ba6b05869 ('paride: use new parport device model')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index b9242d7..4e75c5f 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -877,7 +877,7 @@ static int pd_detect(void)
 	par_drv = pi_register_driver(name);
 	if (!par_drv) {
 		pr_err("failed to register %s driver\n", name);
-		return -1;
+		return 0;
 	}
 
 	if (pd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
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