[PATCH] nfc: trf7970a: Use NULL when no response is expected

When a command's timeout is zero, no response is expected, and the TX
interrupt handler completes the command by passing ERR_PTR(0) to the
digital callback.

ERR_PTR(0) evaluates to NULL, so no errno is encoded here.  Use NULL
directly to avoid suggesting that this is an error-pointer path.

Signed-off-by: Linmao Li <[email protected]>
---
 drivers/nfc/trf7970a.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 08c27bb438b5..7addf243c6f1 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -938,7 +938,7 @@ static irqreturn_t trf7970a_irq(int irq, void *dev_id)
 			if (!trf->timeout) {
 				trf->ignore_timeout =
 				    !cancel_delayed_work(&trf->timeout_work);
-				trf->rx_skb = ERR_PTR(0);
+				trf->rx_skb = NULL;
 				trf7970a_send_upstream(trf);
 				break;
 			}
-- 
2.25.1