[PATCH 5.13 609/800] serial: 8250_omap: fix a timeout loop condition

From: Greg Kroah-Hartman
Date: Mon Jul 12 2021 - 04:51:33 EST


From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ Upstream commit d7e325aaa8c3593b5a572b583ecad79e95f32e7f ]

This loop ends on -1 so the error message will never be printed.

Fixes: 4bcf59a5dea0 ("serial: 8250: 8250_omap: Account for data in flight during DMA teardown")
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/r/YIpd+kOpXKMpEXPf@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/tty/serial/8250/8250_omap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 8ac11eaeca51..c06631ced414 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -813,7 +813,7 @@ static void __dma_rx_do_complete(struct uart_8250_port *p)
poll_count--)
cpu_relax();

- if (!poll_count)
+ if (poll_count == -1)
dev_err(p->port.dev, "teardown incomplete\n");
}
}
--
2.30.2