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Date: Sun, 29 Dec 2013 03:08:43 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Johan Hovold" <jhovold@...il.com>, "Greg Kroah-Hartman" <gregkh@...uxfoundation.org> Subject: [PATCH 3.2 003/185] USB: mos7840: fix tiocmget error handling 3.2.54-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold <jhovold@...il.com> commit a91ccd26e75235d86248d018fe3779732bcafd8d upstream. Make sure to return errors from tiocmget rather than rely on uninitialised stack data. Signed-off-by: Johan Hovold <jhovold@...il.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- drivers/usb/serial/mos7840.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -1689,7 +1689,11 @@ static int mos7840_tiocmget(struct tty_s return -ENODEV; status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); + if (status != 1) + return -EIO; status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); + if (status != 1) + return -EIO; result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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