linux-kernel - Re: [PATCH v3 7/7] dma-buf: system_heap: Add a system-uncached heap re-using the system heap

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Date:   Wed, 7 Oct 2020 10:43:52 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     kbuild@...ts.01.org, John Stultz <john.stultz@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>
Cc:     lkp@...el.com, kbuild-all@...ts.01.org,
        John Stultz <john.stultz@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Liam Mark <lmark@...eaurora.org>,
        Laura Abbott <labbott@...nel.org>,
        Brian Starkey <Brian.Starkey@....com>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Sandeep Patil <sspatil@...gle.com>,
        Daniel Mentz <danielmentz@...gle.com>
Subject: Re: [PATCH v3 7/7] dma-buf: system_heap: Add a system-uncached heap
 re-using the system heap

Hi John,

url:    https://github.com/0day-ci/linux/commits/John-Stultz/dma-buf-Performance-improvements-for-system-heap-a-system-uncached-implementation/20201003-120520
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bcf876870b95592b52519ed4aafcf9d95999bc9c
config: i386-randconfig-m021-20201002 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>

smatch warnings:
drivers/dma-buf/heaps/system_heap.c:496 system_heap_create() warn: passing zero to 'PTR_ERR'

vim +/PTR_ERR +496 drivers/dma-buf/heaps/system_heap.c

efa04fefebbd724 John Stultz     2019-12-03  478  static int system_heap_create(void)
efa04fefebbd724 John Stultz     2019-12-03  479  {
efa04fefebbd724 John Stultz     2019-12-03  480  	struct dma_heap_export_info exp_info;
efa04fefebbd724 John Stultz     2019-12-03  481  
263e38f82cbb35b Andrew F. Davis 2019-12-16  482  	exp_info.name = "system";
efa04fefebbd724 John Stultz     2019-12-03  483  	exp_info.ops = &system_heap_ops;
efa04fefebbd724 John Stultz     2019-12-03  484  	exp_info.priv = NULL;
efa04fefebbd724 John Stultz     2019-12-03  485  
efa04fefebbd724 John Stultz     2019-12-03  486  	sys_heap = dma_heap_add(&exp_info);
efa04fefebbd724 John Stultz     2019-12-03  487  	if (IS_ERR(sys_heap))
a2e10cdd2e4d12a John Stultz     2020-10-03  488  		return PTR_ERR(sys_heap);
efa04fefebbd724 John Stultz     2019-12-03  489  
553f4e0fafc5b3b John Stultz     2020-10-03  490  	exp_info.name = "system-uncached";
553f4e0fafc5b3b John Stultz     2020-10-03  491  	exp_info.ops = &system_uncached_heap_ops;
553f4e0fafc5b3b John Stultz     2020-10-03  492  	exp_info.priv = NULL;
553f4e0fafc5b3b John Stultz     2020-10-03  493  
553f4e0fafc5b3b John Stultz     2020-10-03  494  	sys_uncached_heap = dma_heap_add(&exp_info);
553f4e0fafc5b3b John Stultz     2020-10-03  495  	if (IS_ERR(sys_uncached_heap))
553f4e0fafc5b3b John Stultz     2020-10-03 @496  		return PTR_ERR(sys_heap);
                                                                       ^^^^^^^^^^^^^^^^^
This should be return PTR_ERR(sys_uncached_heap);


---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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