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Commit 09aaf994 authored by Sekhar Nori's avatar Sekhar Nori
Browse files

ARM: davinci: uncompress.h: bail out if uart not initialized 



Bail out of UART access functions in uncompress.h if the uart
port is not setup. This will happen when booting from DT since
machine type matching does not work in this case. This may also
happen if a correct machine type is not setup by bootloader.

Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent 5604f69e

arch/arm/mach-davinci/include/mach/uncompress.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -32,6 +32,9 @@ u32 *uart; 
/* PORT_16C550A, in polled non-fifo mode */

/* PORT_16C550A, in polled non-fifo mode */

static void putc(char c)

static void putc(char c)

{

{

	if (!uart)

		return;



	while (!(uart[UART_LSR] & UART_LSR_THRE))

	while (!(uart[UART_LSR] & UART_LSR_THRE))

		barrier();

		barrier();

	uart[UART_TX] = c;

	uart[UART_TX] = c;
@@ -39,6 +42,9 @@ static void putc(char c) 




static inline void flush(void)

static inline void flush(void)

{

{

	if (!uart)

		return;



	while (!(uart[UART_LSR] & UART_LSR_THRE))

	while (!(uart[UART_LSR] & UART_LSR_THRE))

		barrier();

		barrier();

}

}