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tty: atmel_serial_probe(): index of atmel_ports[] fix

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Index of atmel_ports[ATMEL_MAX_UART] should be smaller
than ATMEL_MAX_UART.

Signed-off-by: Pawel Wieczorkiewicz <wpawel@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pawel Wieczorkiewicz 2013-02-20 17:26:20 +01:00 committed by Greg Kroah-Hartman
parent c51d41a1dd
commit 503bded92d
1 changed files with 5 additions and 6 deletions
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11
drivers/tty/serial/atmel_serial.c
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@ -158,7 +158,7 @@ struct atmel_uart_port {
}; };
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART]; static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
static unsigned long atmel_ports_in_use; static DECLARE_BITMAP(atmel_ports_in_use, ATMEL_MAX_UART);
#ifdef SUPPORT_SYSRQ #ifdef SUPPORT_SYSRQ
static struct console atmel_console; static struct console atmel_console;
@ -1769,15 +1769,14 @@ static int atmel_serial_probe(struct platform_device *pdev)
if (ret < 0) if (ret < 0)
/* port id not found in platform data nor device-tree aliases: /* port id not found in platform data nor device-tree aliases:
* auto-enumerate it */ * auto-enumerate it */
ret = find_first_zero_bit(&atmel_ports_in_use, ret = find_first_zero_bit(atmel_ports_in_use, ATMEL_MAX_UART);
sizeof(atmel_ports_in_use));
if (ret > ATMEL_MAX_UART) { if (ret >= ATMEL_MAX_UART) {
ret = -ENODEV; ret = -ENODEV;
goto err; goto err;
} }
if (test_and_set_bit(ret, &atmel_ports_in_use)) { if (test_and_set_bit(ret, atmel_ports_in_use)) {
/* port already in use */ /* port already in use */
ret = -EBUSY; ret = -EBUSY;
goto err; goto err;
@ -1857,7 +1856,7 @@ static int atmel_serial_remove(struct platform_device *pdev)
/* "port" is allocated statically, so we shouldn't free it */ /* "port" is allocated statically, so we shouldn't free it */
clear_bit(port->line, &atmel_ports_in_use); clear_bit(port->line, atmel_ports_in_use);
clk_put(atmel_port->clk); clk_put(atmel_port->clk);