Re: [PATCH 2/5] Char: isicom, fix probe race

[Jiri Slaby]

Andrew Morton wrote:
> On Sat, 16 Dec 2006 02:09:48 +0100 (CET)
> Jiri Slaby <jirislaby@xxxxxxxxx> wrote:
> 
>> isicom, fix probe race
>>
>> Fix two race conditions in the probe function with mutex.
>>
>> ...
>>
>>  static int __devinit isicom_probe(struct pci_dev *pdev,
>>  	const struct pci_device_id *ent)
>>  {
>> +	static DEFINE_MUTEX(probe_lock);
> 
> hm.  How can isicom_probe() race with itself?  Even with the dreaded
> multithreaded-pci-probing?  It's only called once, by a single thread.
> 
> Confused.

Yeah, I'm a little bit too now. One of developers want me to do this some time
ago and I did it without deep thinking about that. Now, I did it again and as
you wrote, it's completely unreasonable. Please, throw it
(char-isicom-fix-probe-race.patch) away.

thanks,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/