linux-kernel - Re: [RESEND PATCH 2/2] serial: Add driver for the Altera UART

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Message-ID: <20100226195022.GF8417@bicker>
Date:	Fri, 26 Feb 2010 22:50:22 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Tobias Klauser <tklauser@...tanz.ch>
Cc:	linux-serial@...r.kernel.org, nios2-dev@...c.et.ntust.edu.tw,
	linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH 2/2] serial: Add driver for the Altera UART

A couple smatch complaints.

drivers/serial/altera_jtaguart.c
   380          if (co->index >= 0 && co->index <= ALTERA_JTAGUART_MAXPORTS)
   381                  co->index = 0;
   382          port = &altera_jtaguart_ports[co->index].port;

This test seems backward.  co->index == -1 would be a buffer underflow.

drivers/serial/altera_uart.c
   455          if ((co->index >= 0)
   456              && (co->index <= CONFIG_SERIAL_ALTERA_UART_MAXPORTS))
   457                  co->index = 0;
   458          port = &altera_uart_ports[co->index].port;

Same here.

regards,
dan carpenter
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