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authorIan Campbell <icampbell@arcom.com>2005-07-07 17:58:52 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-07 18:24:04 -0700
commit69a4d56bae492b1a5e74459d9d771d9bc7f9320f (patch)
tree62a8531c160d56b3761034cb9803bf2fbd1c1392 /drivers
parent08d805258f69bff5ba8268a969f140ef1f105c71 (diff)
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[PATCH] pcmcia: fix i82365 request_region double usage
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f354942cb301fed273f423fb5c4f57bde3efc5b2 converted the check_region() calls in drivers/pcmcia/i82365.c into request_regions. Unfortunately this seems to have broken things. isa_probe() used to call check_region() and then call add_pcic() which would request_region(). Now isa_probe() calls request_region() and then calls add_pcic() which calls request_region() again, this fails and add_pcic() returns immediately without doing all the setup etc. On the face of it the patch below fixes the problem, by not doing the second request region in add_pcic(). I think this is preferable to remove the call in isa_probe() since identify() touches the I/O regions and is called before add_pcic(). However I haven't fully grokked the meaning of the code which follows the request_region() in isa_probe(), so I'm not sure that the handling WRT multiple sockets and multiple bridge chips is correct. In particular I'm not convinced that the regions for subsequent sockets and/or bridges will be requested at all. I suspect a more thorough reworking by someone who understands what is going on there might be in order. I should mention that I'm actually messing about with this on an ARM platform with wacky memory and i/o mapping offsets etc, it doesn't quite work yet for other reasons which preclude full testing etc, but I think the problem above is still present for more normal x86 stuff. Signed-off-by: Ian Campbell <icampbell@arcom.com> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pcmcia/i82365.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/pcmcia/i82365.c b/drivers/pcmcia/i82365.c
index d72f9a35c8b..3546158ef77 100644
--- a/drivers/pcmcia/i82365.c
+++ b/drivers/pcmcia/i82365.c
@@ -698,14 +698,6 @@ static void __init add_pcic(int ns, int type)
struct i82365_socket *t = &socket[sockets-ns];
base = sockets-ns;
- if (t->ioaddr > 0) {
- if (!request_region(t->ioaddr, 2, "i82365")) {
- printk(KERN_ERR "i82365: IO region conflict at %#lx, not available\n",
- t->ioaddr);
- return;
- }
- }
-
if (base == 0) printk("\n");
printk(KERN_INFO " %s", pcic[type].name);
printk(" ISA-to-PCMCIA at port %#lx ofs 0x%02x",