From: Jiri Slaby <jslaby@novell.com>
Date: Wed, 9 Dec 2009 20:34:13 +0000 (-0800)
Subject: serial: Char: cyclades, fix compiler warning
X-Git-Tag: v2.6.34-rc1~216^2~26
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a357e777b5982d5f460a2783d697a8a90d497348;p=karo-tx-linux.git

serial: Char: cyclades, fix compiler warning

With gcc 4.0.2:
drivers/char/cyclades.c: In function 'cyy_interrupt':
drivers/char/cyclades.c:581: warning: 'info' may be used uninitialized in this function

introduced by

: commit 3aeea5b92210083c7cffd4f08a0bb141d3f2d574
: Author:     Jiri Slaby <jirislaby@gmail.com>
: AuthorDate: Sat Sep 19 13:13:16 2009 -0700
: Commit:     Live-CD User <linux@linux.site>
: CommitDate: Sat Sep 19 13:13:16 2009 -0700
:
:    cyclades: introduce cyy_readb/writeb

In fact the true branch which uses uninitialized 'info' can never
happen because chip is always less than ->nchips and channel is
always less than 4 which we alloc.

So behave similar to rx handling and remove the test completely.

I wonder why gcc 4.4.1 doesn't spit a word.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 4254457d3911..274e9651fa36 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -598,12 +598,6 @@ static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
 	save_car = readb(base_addr + (CyCAR << index));
 	cy_writeb(base_addr + (CyCAR << index), save_xir);
 
-	/* validate the port# (as configured and open) */
-	if (channel + chip * 4 >= cinfo->nports) {
-		cy_writeb(base_addr + (CySRER << index),
-			  readb(base_addr + (CySRER << index)) & ~CyTxRdy);
-		goto end;
-	}
 	info = &cinfo->ports[channel + chip * 4];
 	tty = tty_port_tty_get(&info->port);
 	if (tty == NULL) {