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Subject2.4.21-pre4 comparison bugs
Hello!

Thanks to whoever mentioned "gcc -W", it's *sweet* ;)
Looking at it's output I found few cases where error checking
does not work.
Though nothing too serious it seems (except maybe IDE setup-pci stuff,
I just do not know about that, and may be in that case
we actually want to change all the functions to return signed
value, though my fix is certainly less intrusive ;) )
Most of the patched stuff in here assigns signed value to unsigned
variable and then checks if it is less than zero which does not work
for obvious reasons ;)
I decided taht in most cases simple casting to int would be best
and least intrusive resolution of a problem.
The only exception is fs/isofs/inode.c, there we have unsigned int
(so it is unsigned not depending on any arch) and so '> some num'
stuff will also check for former negative numbers anyway. So
I removed one extra comparison in that case.
See the patch below.

Bye,
Oleg

===== drivers/ide/setup-pci.c 1.2 vs edited =====
--- 1.2/drivers/ide/setup-pci.c Thu Dec 12 04:09:23 2002
+++ edited/drivers/ide/setup-pci.c Sat Feb 8 19:06:13 2003
@@ -582,7 +582,7 @@

index.all = 0xf0f0;

- if((autodma = ide_setup_pci_controller(dev, d, noisy, &tried_config)) < 0)
+ if((int)(autodma = ide_setup_pci_controller(dev, d, noisy, &tried_config)) < 0)
return index;

/*
@@ -613,7 +613,7 @@
} else {
if (d->init_chipset)
{
- if(d->init_chipset(dev, d->name) < 0)
+ if((int)d->init_chipset(dev, d->name) < 0)
return index;
}
if (noisy)
===== drivers/net/tun.c 1.8 vs edited =====
--- 1.8/drivers/net/tun.c Mon Apr 22 21:38:08 2002
+++ edited/drivers/net/tun.c Sat Feb 8 19:07:28 2003
@@ -188,7 +188,7 @@
size_t len = count;

if (!(tun->flags & TUN_NO_PI)) {
- if ((len -= sizeof(pi)) < 0)
+ if ((int)(len -= sizeof(pi)) < 0)
return -EINVAL;

memcpy_fromiovec((void *)&pi, iv, sizeof(pi));
===== fs/isofs/inode.c 1.9 vs edited =====
--- 1.9/fs/isofs/inode.c Mon Jul 1 02:25:33 2002
+++ edited/fs/isofs/inode.c Sat Feb 8 19:15:41 2003
@@ -343,13 +343,13 @@
if (!strcmp(this_char,"session") && value) {
char * vpnt = value;
unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0);
- if(ivalue < 0 || ivalue >99) return 0;
+ if(ivalue > 99) return 0;
popt->session=ivalue+1;
}
if (!strcmp(this_char,"sbsector") && value) {
char * vpnt = value;
unsigned int ivalue = simple_strtoul(vpnt, &vpnt, 0);
- if(ivalue < 0 || ivalue >660*512) return 0;
+ if(ivalue > 660*512) return 0;
popt->sbsector=ivalue;
}
else if (!strcmp(this_char,"check") && value) {
===== net/sunrpc/pmap_clnt.c 1.3 vs edited =====
--- 1.3/net/sunrpc/pmap_clnt.c Wed Apr 24 12:58:19 2002
+++ edited/net/sunrpc/pmap_clnt.c Sat Feb 8 19:09:20 2003
@@ -149,7 +149,7 @@
struct sockaddr_in sin;
struct rpc_portmap map;
struct rpc_clnt *pmap_clnt;
- unsigned int error = 0;
+ int error = 0;

dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n",
prog, vers, prot, port);
-
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