Snd_cx88_create: don't dereference NULL core

From: Duncan Sands <duncan.sands@math.u-psud.fr>

If the call to cx88_core_get returns a NULL value, it is dereferenced
by cx88_reset, and perhaps by cx88_core_put.  Spotted by the Coverity
checker.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 152 insertions, 106 deletions

diff --git a/v4l/scripts/hghead.pl b/v4l/scripts/hghead.pl
new file mode 100755
index 000000000..ddaef0767
--- /dev/null
+++ b/v4l/scripts/hghead.pl
@@ -0,0 +1,152 @@
+#!/usr/bin/perl
+use strict;
+use Date::Parse;
+
+#################################################################
+# analyse diffs
+
+my $in = shift;
+my $line;
+my $subject;
+my $from=0;
+my $sub_ok=0;
+my $init=0;
+my $num=0;
+my $maint_ok=0;
+my $noblank=1;
+my $maintainer_name=$ENV{CHANGE_LOG_NAME};
+my $maintainer_email=$ENV{CHANGE_LOG_EMAIL_ADDRESS};
+my $from="";
+my $body="";
+my $signed="";
+my $fromname="";
+
+open IN,  "<$in";
+
+while ($line = <IN>) {
+	if ($line =~ m/Index.*/) {
+		last;
+	}
+	if ($line =~ m/^diff .*/) {
+		last;
+	}
+	if ($line =~ m/^\-\-\- .*/) {
+		last;
+	}
+	if ($line =~ m/^\-\-\-.*/) {
+		last;
+	}
+	if ($line =~ m/^\+\+\+ .*/) {
+		last;
+	}
+
+	if ($line =~ m/^Date:\s*(.*)/) {
+		my $time = str2time($1);
+#		my $timestr = gmtime($time);
+
+		if ($time) {
+			print "# Date: $time\n";
+		}
+		next;
+	}
+	if ($line =~ m/^From:/) {
+		if ($line =~ m/^From:[\s\"]*([^\"]*)[\s\"]*<(.*)>/) {
+			if ($1 eq "") {
+				next;
+			}
+			my $name=$1;
+			my $email=$2;
+			$name =~ s/\s+$//;
+			$email =~ s/\s+$//;
+			$fromname="$name <$email>";
+			$from= "From: $fromname\n";
+			next;
+		}
+		print "Bad: author line have a wrong syntax\n";
+		die;
+	}
+
+	if ($line =~ m/^Subject:\s*(.*\n)/) {
+		$subject=$1;
+		next;
+	}
+
+	if ($line =~ m;^ .*\/.*\| *[0-9]*;) {
+		next;
+	}
+	if ($line =~m/\d+\s*file.* changed, /) {
+		next;
+	}
+
+	if ($line =~ m/^Signed-off-by:.*/) {
+		$noblank=1;
+		if ($line =~ m/$maintainer_name/) {
+			$maint_ok=1;
+		}
+
+		$signed="$signed$line";
+		next;
+	}
+	if ($line =~ m/^Acked-by:.*/) {
+		$signed="$signed$line";
+		next;
+	}
+
+	if ($line =~ m/^[a-zA-Z\-]*:/) {
+		if ($line =~ m/Changeset:\s*(.*)\n/) {
+			$num=$1;
+		}
+		print "# $line";
+		next;
+	}
+
+	if ($line =~ m|^(V4L\/DVB\s*\(.+\)\s*:.*\n)|) {
+		$subject=$1;
+		$line="\n";
+	}
+
+	if ($sub_ok == 0) {
+		$sub_ok=1;
+		substr( $subject, 0, 1 ) = uc (substr ($subject, 0, 1));
+		if ($subject =~ m|V4L\/DVB\s*(.+)|) {
+			$subject=$1;
+		}
+		if ($line =~ m/^\n/) {
+			next;
+		}
+	}
+
+	if ($noblank) {
+		if ($line =~ m/^\n/) {
+			next;
+		}
+	}
+	if (!$init) {
+		$init=1;
+		$noblank=0;
+	}
+	$body="$body$line";
+}
+close IN;
+
+if ($from eq "") {
+	print "Bad: author doesn't exist!\n";
+	die;
+}
+
+if (!$maint_ok) {
+	$signed=$signed."Signed-off-by: $maintainer_name <$maintainer_email>\n";
+}
+
+if (!$signed =~ m/$from/) {
+	print "Bad: Author didn't signed his patch!\n";
+	die;
+}
+
+$body=~s/\n+$//;
+$body=~s/^\n+$//;
+
+# First from is used by hg to recognize commiter name
+print "#Committer: $maintainer_name <$maintainer_email>\n";
+print "$subject\n$from\n$body\n\n$signed";
+
diff --git a/v4l/scripts/usbaudio_setup.sh b/v4l/scripts/usbaudio_setup.sh
deleted file mode 100755
index 66fdd23df..000000000
--- a/v4l/scripts/usbaudio_setup.sh
+++ /dev/null
@@ -1,106 +0,0 @@
-#!/bin/bash
-#
-# Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com>
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-#
-
-which /usr/bin/dialog >/dev/null
-if [ "0" != "$?" ]; then
-echo "this tool requires  \"dialog\" (http://hightek.org/dialog/)"
-exit 1
-fi
-uid=`id -u`
-if [ "0" != "$uid" ]; then
-echo "this tool must be run as root, you can disable this message by editing the script but only do that unless you know what you're doing!"
-exit 1
-fi
-which gcc > /dev/null
-if [ "0" != "$?" ]; then
-echo "this tool won't work unless you install gcc"
-exit 1
-fi
-test -f ossid
-if [ "0" != "$?" ]; then
-cat > ossid.c <<_EOF
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <linux/soundcard.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-int main(int argc, char **argv){
-        int fd;
-        struct mixer_info *info;
-        fd=open(argv[1],O_RDONLY);
-        if(fd>=0){
-                info=malloc(sizeof(struct mixer_info));
-                ioctl(fd,SOUND_MIXER_INFO,info);
-                printf("%c \"%s %s\"\n",(argv[1][strlen(argv[1])-1]=='p')?'0':(argv[1][strlen(argv[1])-1]+1),info->name,info->id);
-                free(info);
-                close(fd);
-        } else {
-                return 1;
-        }
-        return 0;
-}
-_EOF
-gcc ossid.c -o ossid
-rm ossid.c
-fi
-
-test -f /proc/asound/cards
-if [ "0" != "$?" ]; then
-dialog --title "Welcome" --backtitle "Empia Sound Configuration" \
---msgbox "Your system doesn't support ALSA, please have a look at \
-www.alsa-project.org and set it up properly \
-
-
-Press any key to continue... " 11 50
-exit 1;
-fi
-
-dialog --title "Welcome" --backtitle "Empia Sound Configuration" \
---msgbox "This tool was written to ease up sound configuration for
-* Terratec Hybrid XS
-* Terratec Cinergy 250 USB 2.0
-* Hauppauge HVR 900
-* and possible others :)
-
-first select an usb audio source, as target choose your soundcard
-Press any key to continue... " 13 60
-
-ls /dev/dsp* | while read a; do ./ossid $a; done | xargs dialog --menu "Choose your TV Audio source:" 12 60 5 2>/tmp/em2880_source.$$
-ls /dev/dsp* | while read a; do ./ossid $a; done | xargs dialog --menu "Choose your output soundcard device:" 12 60 5 2>/tmp/em2880_dst.$$
-
-source=`egrep '^[0-9p]' /tmp/em2880_source.$$`
-dst=`egrep '^[0-9p]' /tmp/em2880_dst.$$`
-
-echo "playing $source to $dst";
-if [ "$source" = "0" ]; then
-	device="/dev/dsp"
-else
-	device="/dev/dsp`expr $source - 1`"
-fi
-
-if [ "$dst" = "0" ]; then
-	device2="/dev/dsp"
-else
-	device2="/dev/dsp`expr $source - 1`"
-fi
-clear
-echo "Using command: sox -r 48000 -w -c 2 -t ossdsp $device -t ossdsp $device2"
-sox -r 48000 -w -c 2 -t ossdsp $device -t ossdsp $device2