arch/s390/kvm/pci.c:58:68: sparse: sparse: Using plain integer as NULL pointer

From: kernel test robot
Date: Sun Aug 14 2022 - 00:09:10 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: aea23e7c464bfdec04b52cf61edb62030e9e0d0a
commit: 98b1d33dac5fd09060486762c02fd1a78baeb1e0 KVM: s390: pci: do initial setup for AEN interpretation
date: 5 weeks ago
config: s390-randconfig-s053-20220814 (https://download.01.org/0day-ci/archive/20220814/202208141105.tF57XnDg-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=98b1d33dac5fd09060486762c02fd1a78baeb1e0
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 98b1d33dac5fd09060486762c02fd1a78baeb1e0
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/kvm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)
>> arch/s390/kvm/pci.c:58:68: sparse: sparse: Using plain integer as NULL pointer

vim +58 arch/s390/kvm/pci.c

48
49 static int zpci_setup_aipb(u8 nisc)
50 {
51 struct page *page;
52 int size, rc;
53
54 zpci_aipb = kzalloc(sizeof(union zpci_sic_iib), GFP_KERNEL);
55 if (!zpci_aipb)
56 return -ENOMEM;
57
> 58 aift->sbv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC, 0);
59 if (!aift->sbv) {
60 rc = -ENOMEM;
61 goto free_aipb;
62 }
63 zpci_aif_sbv = aift->sbv;
64 size = get_order(PAGE_ALIGN(ZPCI_NR_DEVICES *
65 sizeof(struct zpci_gaite)));
66 page = alloc_pages(GFP_KERNEL | __GFP_ZERO, size);
67 if (!page) {
68 rc = -ENOMEM;
69 goto free_sbv;
70 }
71 aift->gait = (struct zpci_gaite *)page_to_phys(page);
72
73 zpci_aipb->aipb.faisb = virt_to_phys(aift->sbv->vector);
74 zpci_aipb->aipb.gait = virt_to_phys(aift->gait);
75 zpci_aipb->aipb.afi = nisc;
76 zpci_aipb->aipb.faal = ZPCI_NR_DEVICES;
77
78 /* Setup Adapter Event Notification Interpretation */
79 if (zpci_set_irq_ctrl(SIC_SET_AENI_CONTROLS, 0, zpci_aipb)) {
80 rc = -EIO;
81 goto free_gait;
82 }
83
84 return 0;
85
86 free_gait:
87 free_pages((unsigned long)aift->gait, size);
88 free_sbv:
89 airq_iv_release(aift->sbv);
90 zpci_aif_sbv = NULL;
91 free_aipb:
92 kfree(zpci_aipb);
93 zpci_aipb = NULL;
94
95 return rc;
96 }
97

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0-DAY CI Kernel Test Service
https://01.org/lkp