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path: root/drivers/tty/serial/amba-pl011.c
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Diffstat (limited to 'drivers/tty/serial/amba-pl011.c')
-rw-r--r--drivers/tty/serial/amba-pl011.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index d4eda24aa68b..dacf0a09ab24 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -318,7 +318,7 @@ static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port *
.src_addr = uap->port.mapbase + UART01x_DR,
.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
.direction = DMA_DEV_TO_MEM,
- .src_maxburst = uap->fifosize >> 1,
+ .src_maxburst = uap->fifosize >> 2,
.device_fc = false,
};
@@ -2176,6 +2176,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
static int pl011_remove(struct amba_device *dev)
{
struct uart_amba_port *uap = amba_get_drvdata(dev);
+ bool busy = false;
int i;
uart_remove_one_port(&amba_reg, &uap->port);
@@ -2183,9 +2184,12 @@ static int pl011_remove(struct amba_device *dev)
for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
if (amba_ports[i] == uap)
amba_ports[i] = NULL;
+ else if (amba_ports[i])
+ busy = true;
pl011_dma_remove(uap);
- uart_unregister_driver(&amba_reg);
+ if (!busy)
+ uart_unregister_driver(&amba_reg);
return 0;
}