RE: [EXT] Re: [PATCH] octeontx2-vf: Add missing free for alloc_percpu

[Geethasowjanya Akula <gakula@marvell.com>]

>-----Original Message-----
>From: Michal Swiatkowski <michal.swiatkowski@linux.intel.com> 
>Sent: Thursday, March 16, 2023 1:40 PM
>To: Jiasheng Jiang <jiasheng@iscas.ac.cn>
>Cc: Sunil Kovvuri Goutham <sgoutham@marvell.com>; Geethasowjanya Akula <gakula@marvell.com>; Subbaraya Sundeep Bhatta <sbhatta@marvell.com>; Hariprasad Kelam <hkelam@marvell.com>; >davem@davemloft.net; edumazet@google.com; kuba@kernel.org; pabeni@redhat.com; richardcochran@gmail.com; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
>Subject: [EXT] Re: [PATCH] octeontx2-vf: Add missing free for alloc_percpu

>External Email

>----------------------------------------------------------------------
>On Thu, Mar 16, 2023 at 10:39:11AM +0800, Jiasheng Jiang wrote:
>> Add the free_percpu for the allocated "vf->hw.lmt_info" in order to 
>> avoid memory leak, same as the "pf->hw.lmt_info" in 
>> `drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c`.
>> 
>> Fixes: 5c0512072f65 ("octeontx2-pf: cn10k: Use runtime allocated 
>> LMTLINE region")
>> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
>> ---
>>  drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>> 
>> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c 
>> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
>> index 7f8ffbf79cf7..9db2e2d218bb 100644
>> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
>> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
>> @@ -709,6 +709,8 @@ static int otx2vf_probe(struct pci_dev *pdev, 
>> const struct pci_device_id *id)
>>  err_ptp_destroy:
>>  	otx2_ptp_destroy(vf);
>>  err_detach_rsrc:
>> +	if (vf->hw.lmt_info)
>> +		free_percpu(vf->hw.lmt_info);
>>  	if (test_bit(CN10K_LMTST, &vf->hw.cap_flag))
>>  		qmem_free(vf->dev, vf->dync_lmt);
>I wonder if it wouldn't be more error prune when You create a function to unroll cn10k_lmtst_init() like cn10k_lmtst_deinit(). These two if can be there, maybe also sth else is missing.

>Otherwise it is fine
>Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>

>>  	otx2_detach_resources(&vf->mbox);
>> @@ -762,6 +764,8 @@ static void otx2vf_remove(struct pci_dev *pdev)
>>  	otx2_shutdown_tc(vf);
>>  	otx2vf_disable_mbox_intr(vf);
>>  	otx2_detach_resources(&vf->mbox);
>> +	if (vf->hw.lmt_info)
>> +		free_percpu(vf->hw.lmt_info);

Ack. Thanks for the patch.

>>  	if (test_bit(CN10K_LMTST, &vf->hw.cap_flag))
>>  		qmem_free(vf->dev, vf->dync_lmt);
>>  	otx2vf_vfaf_mbox_destroy(vf);
>> --
>> 2.25.1
>> 

Geetha.