[patch] spi: checking for NULL instead of IS_ERR

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

spi_replace_transfers() returns error pointers on error, it never
returns NULL.

Fixes: d9f121227281 ('spi: core: add spi_split_transfers_maxsize')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 1413a6b..d459adc 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2284,8 +2284,8 @@ int __spi_split_transfer_maxsize(struct spi_master *master,
 
 	/* create replacement */
 	srt = spi_replace_transfers(msg, xfer, 1, count, NULL, 0, gfp);
-	if (!srt)
-		return -ENOMEM;
+	if (IS_ERR(srt))
+		return PTR_ERR(srt);
 	xfers = srt->inserted_transfers;
 
 	/* now handle each of those newly inserted spi_transfers
--
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