Commit c5b529b3 authored by Marcel Sebek's avatar Marcel Sebek Committed by Vojtech Pavlik

input: Use request_region() instead of check_region() in ns558.c

       it's both safer and correct.
parent e2bf29ee
......@@ -77,7 +77,7 @@ static void ns558_isa_probe(int io)
* No one should be using this address.
*/
if (check_region(io, 1))
if (!request_region(io, 1, "ns558-isa"))
return;
/*
......@@ -89,7 +89,8 @@ static void ns558_isa_probe(int io)
outb(~c & ~3, io);
if (~(u = v = inb(io)) & 3) {
outb(c, io);
return;
i = 0;
goto out;
}
/*
* After a trigger, there must be at least some bits changing.
......@@ -99,7 +100,8 @@ static void ns558_isa_probe(int io)
if (u == v) {
outb(c, io);
return;
i = 0;
goto out;
}
wait_ms(3);
/*
......@@ -110,7 +112,8 @@ static void ns558_isa_probe(int io)
for (i = 0; i < 1000; i++)
if ((u ^ inb(io)) & 0xf) {
outb(c, io);
return;
i = 0;
goto out;
}
/*
* And now find the number of mirrors of the port.
......@@ -118,7 +121,9 @@ static void ns558_isa_probe(int io)
for (i = 1; i < 5; i++) {
if (check_region(io & (-1 << i), (1 << i))) /* Don't disturb anyone */
release_region(io & (-1 << (i-1)), (1 << (i-1)));
if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) /* Don't disturb anyone */
break;
outb(0xff, io & (-1 << i));
......@@ -126,15 +131,22 @@ static void ns558_isa_probe(int io)
if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
wait_ms(3);
if (b > 300) /* We allow 30% difference */
if (b > 300) { /* We allow 30% difference */
release_region(io & (-1 << i), (1 << i));
break;
}
}
i--;
if (i != 4) {
if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
return;
}
if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
printk(KERN_ERR "ns558: Memory allocation failed.\n");
return;
goto out;
}
memset(port, 0, sizeof(struct ns558));
......@@ -148,8 +160,6 @@ static void ns558_isa_probe(int io)
sprintf(port->phys, "isa%04x/gameport0", io & (-1 << i));
sprintf(port->name, "NS558 ISA");
request_region(io & (-1 << i), (1 << i), "ns558-isa");
gameport_register_port(&port->gameport);
printk(KERN_INFO "gameport: NS558 ISA at %#x", port->gameport.io);
......@@ -157,6 +167,9 @@ static void ns558_isa_probe(int io)
printk(" speed %d kHz\n", port->gameport.speed);
list_add(&port->node, &ns558_list);
return;
out:
release_region(io & (-1 << i), (1 << i));
}
#ifdef CONFIG_PNP
......
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