diff options
| -rw-r--r-- | src/drivers/uart/uart8250io.c | 3 | ||||
| -rw-r--r-- | src/drivers/uart/uart8250mem.c | 4 | ||||
| -rw-r--r-- | src/soc/broadcom/cygnus/ns16550.c | 4 |
3 files changed, 8 insertions, 3 deletions
diff --git a/src/drivers/uart/uart8250io.c b/src/drivers/uart/uart8250io.c index ac3315a421..4cc7fe3e0b 100644 --- a/src/drivers/uart/uart8250io.c +++ b/src/drivers/uart/uart8250io.c @@ -62,7 +62,8 @@ static int uart8250_can_rx_byte(unsigned base_port) static unsigned char uart8250_rx_byte(unsigned base_port) { unsigned long int i = SINGLE_CHAR_TIMEOUT; - while (i-- && !uart8250_can_rx_byte(base_port)); + while (i && !uart8250_can_rx_byte(base_port)) + i--; if (i) return inb(base_port + UART8250_RBR); diff --git a/src/drivers/uart/uart8250mem.c b/src/drivers/uart/uart8250mem.c index 4e53a92a46..a142cb111a 100644 --- a/src/drivers/uart/uart8250mem.c +++ b/src/drivers/uart/uart8250mem.c @@ -82,8 +82,10 @@ static int uart8250_mem_can_rx_byte(void *base) static unsigned char uart8250_mem_rx_byte(void *base) { unsigned long int i = SINGLE_CHAR_TIMEOUT; - while (i-- && !uart8250_mem_can_rx_byte(base)) + while (i && !uart8250_mem_can_rx_byte(base)) { udelay(1); + i--; + } if (i) return uart8250_read(base, UART8250_RBR); else diff --git a/src/soc/broadcom/cygnus/ns16550.c b/src/soc/broadcom/cygnus/ns16550.c index 71a4cb08ef..aa9dd2d818 100644 --- a/src/soc/broadcom/cygnus/ns16550.c +++ b/src/soc/broadcom/cygnus/ns16550.c @@ -84,8 +84,10 @@ static int ns16550_tst_byte(void) static unsigned char ns16550_rx_byte(void) { unsigned long int i = SINGLE_CHAR_TIMEOUT; - while (i-- && !ns16550_tst_byte()) + while (i && !ns16550_tst_byte()) { udelay(1); + i--; + } if (i) return read32(®s->rbr); else |