[PATCH 5.15 094/120] fpga: stratix10-soc: Fix return value check in s10_ops_write_init()

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Zheng Yongjun <zhengyongjun3@xxxxxxxxxx>

commit 65ea840afd508194b0ee903256162aa87e46ec30 upstream.

In case of error, the function stratix10_svc_allocate_memory()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().

Fixes: e7eef1d7633a ("fpga: add intel stratix10 soc fpga manager driver")
Signed-off-by: Zheng Yongjun <zhengyongjun3@xxxxxxxxxx>
Reviewed-by: Russ Weight <russell.h.weight@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Xu Yilun <yilun.xu@xxxxxxxxx>
Link: https://lore.kernel.org/r/20221126071430.19540-1-zhengyongjun3@xxxxxxxxxx
Signed-off-by: Xu Yilun <yilun.xu@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/fpga/stratix10-soc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/fpga/stratix10-soc.c
+++ b/drivers/fpga/stratix10-soc.c
@@ -213,9 +213,9 @@ static int s10_ops_write_init(struct fpg
 	/* Allocate buffers from the service layer's pool. */
 	for (i = 0; i < NUM_SVC_BUFS; i++) {
 		kbuf = stratix10_svc_allocate_memory(priv->chan, SVC_BUF_SIZE);
-		if (!kbuf) {
+		if (IS_ERR(kbuf)) {
 			s10_free_buffers(mgr);
-			ret = -ENOMEM;
+			ret = PTR_ERR(kbuf);
 			goto init_done;
 		}