From a357e777b5982d5f460a2783d697a8a90d497348 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 9 Dec 2009 12:34:13 -0800 Subject: [PATCH] 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 : AuthorDate: Sat Sep 19 13:13:16 2009 -0700 : Commit: Live-CD User : 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 Cc: Alan Cox Signed-off-by: Jiri Slaby Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/char/cyclades.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index 4254457d391..274e9651fa3 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) { -- 2.39.3