linux-kernel - Re: [PATCHv2] misc: cxl: delete possible null pointer dereference

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Message-ID: <5BB59DF5.7070106@huawei.com>
Date:   Thu, 4 Oct 2018 12:58:29 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     <andrew.donnellan@....ibm.com>, <fbarrat@...ux.vnet.ibm.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv2] misc: cxl: delete possible null pointer dereference

On 2018/10/4 12:38, Greg KH wrote:
> On Thu, Oct 04, 2018 at 10:56:48AM +0800, zhong jiang wrote:
>> It is safe to dereference an object below a NULL test. For the sake
>> of debugging. Just delete the call of possible null pointer dereference.
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
>> ---
>>  drivers/misc/cxl/guest.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
>> index 3bc0c15..472e8db 100644
>> --- a/drivers/misc/cxl/guest.c
>> +++ b/drivers/misc/cxl/guest.c
>> @@ -1018,7 +1018,7 @@ int cxl_guest_init_afu(struct cxl *adapter, int slice, struct device_node *afu_n
>>  
>>  void cxl_guest_remove_afu(struct cxl_afu *afu)
>>  {
>> -	pr_devel("in %s - AFU(%d)\n", __func__, afu->slice);
>> +	pr_devel("in %s\n", __func__);
> This call should just be deleted, it's not needed, ftrace can be used
> instead.
Fine.  Will do.

Sincerely,
zhong jiang
> thanks,
>
> greg k-h
>
> .
>