> On 07/08/2015 04:00 PM, Michal Nazarewicz wrote:
>> On Tue, Jul 07 2015, Krzysztof Opasiak wrote:
>>> This patch replace dynamicly allocated luns array with static one.
>>> This simplifies the code of mass storage function and modules.
>>>
>>> It also fix issue with reporting wrong number of LUNs in GET_MAX_LUN
>>> request. According to MS spec we should return the max index of valid
>>> LUN, not the number of luns - 1.
>>
>> This is no longer true, is it? Why my fix this bug has been solved, no?
>> As such, this should not go to stable. Or am I missing something?
On Mon, Jul 20 2015, Krzysztof Opasiak wrote:
> Unfortunately it's still true. Your fix solved this bug partially. Now
> we report nluns - 1 instead of FSG_LUN_MAX but in case of not contiguous
> luns it is not enough.
>
> Let's consider mass storage function with luns 0 1 3 5. nluns == 4 so in
> GET_MAX_LUN we will return 3 (nluns - 1).
I don’t believe that’s accurate. See loop in my patch:
+ if (!opts->refcnt) {
+ for (nluns = i = 0; i < FSG_MAX_LUNS; ++i)
+ if (common->luns[i])
+ nluns = i + 1;
+ if (!nluns)
+ pr_warn("No LUNS defined, continuing anyway\n");
+ else
+ common->nluns = nluns;
+ pr_info("Number of LUNs=%u\n", common->nluns);
+ }
It iterates over all luns and if lun is non-NULL it sets nluns to index
of that lun plus one. So if luns[0], lun[1], lun[2], lun[3] and lun[5]
are set, common->nluns = 6.
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michał “mina86” Nazarewicz (o o)
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