linux-kernel - Re: [PATCH 1/1] powerpc: fix a memory leak

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Date:   Fri, 15 Sep 2023 10:50:28 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Tyrel Datwyler <tyreld@...ux.ibm.com>,
        Yuanjun Gong <ruc_gongyuanjun@....com>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] powerpc: fix a memory leak

Tyrel Datwyler <tyreld@...ux.ibm.com> writes:
> On 9/14/23 02:46, Yuanjun Gong wrote:
>> When one of the methods xive_native_alloc_irq_on_chip, irq_create_mapping
>> or irq_get_handler_data fails, the function will directly return without
>> disposing vinst->name and vinst. Fix it.
>> 
>> Fixes: c20e1e299d93 ("powerpc/vas: Alloc and setup IRQ and trigger port address")
>> Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@....com>
>> ---
>>  arch/powerpc/platforms/powernv/vas.c | 14 +++++++++-----
>>  1 file changed, 9 insertions(+), 5 deletions(-)
>> 
>> diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c
>> index b65256a63e87..780740b478f0 100644
>> --- a/arch/powerpc/platforms/powernv/vas.c
>> +++ b/arch/powerpc/platforms/powernv/vas.c
>> @@ -54,7 +54,7 @@ static int init_vas_instance(struct platform_device *pdev)
>>  	struct xive_irq_data *xd;
>>  	uint32_t chipid, hwirq;
>>  	struct resource *res;
>> -	int rc, cpu, vasid;
>> +	int rc, cpu, vasid, ret;
>
> You can you reuse rc for the return value in the error path instead of
> introducing a new ret variable.

Yep, please send a v2.

cheers