[patch -next] spi: spi-xilinx: cleanup a check in xilinx_spi_txrx_bufs()

[Dan Carpenter]

'!' has higher precedence than comparisons so the original condition
is equivalent to "if (xspi->remaining_bytes == 0)".  This makes the
static checkers complain.

xspi->remaining_bytes is signed and from looking at the code
briefly, I think it might be able to go negative.  I suspect that
going negative may cause a bug, but I don't have the hardware and
can't test.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 0b8398c..fb56fcf 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -301,7 +301,7 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
 		}
 
 		/* See if there is more data to send */
-		if (!xspi->remaining_bytes > 0)
+		if (xspi->remaining_bytes <= 0)
 			break;
 	}