Re: [PATCH v3 7/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs

From: kbuild test robot
Date: Mon Oct 26 2015 - 20:32:59 EST


Hi Jake,

[auto build test WARNING on next-20151022 -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url: https://github.com/0day-ci/linux/commits/jakeo-microsoft-com/New-paravirtual-PCI-front-end-for-Hyper-V-VMs/20151027-072118
config: i386-allmodconfig (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All warnings (new ones prefixed by >>):

drivers/pci/host/hv_pcifront.c: In function 'prepopulate_bars':
>> drivers/pci/host/hv_pcifront.c:1114:23: warning: right shift count >= width of type [-Wshift-count-overflow]
(u32)(high_base >> 32));
^
drivers/pci/host/hv_pcifront.c: In function 'hv_pci_onchannelcallback':
>> drivers/pci/host/hv_pcifront.c:1648:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
comp_packet = (struct pci_packet *)req_id;
^
drivers/pci/host/hv_pcifront.c: In function 'hv_pci_allocate_bridge_windows':
>> drivers/pci/host/hv_pcifront.c:1817:8: warning: large integer implicitly truncated to unsigned type [-Woverflow]
0x100000000, -1,
^

coccinelle warnings: (new ones prefixed by >>)

>> drivers/pci/host/hv_pcifront.c:1405:31-33: ERROR: reference preceded by free on line 1383

vim +1114 drivers/pci/host/hv_pcifront.c

1098 } else {
1099 bar_val |= 0xffffffffULL << 32;
1100 }
1101 bar_size = get_bar_size(bar_val);
1102 if (high) {
1103 if (high_size != bar_size) {
1104 i++;
1105 continue;
1106 }
1107 _hv_pcifront_write_config(hpdev,
1108 PCI_BASE_ADDRESS_0 + (4 * i),
1109 4,
1110 (u32)(high_base & 0xffffff00));
1111 _hv_pcifront_write_config(hpdev,
1112 PCI_BASE_ADDRESS_0 +
1113 (4 * (i + 1)), 4,
> 1114 (u32)(high_base >> 32));
1115 high_base += bar_size;
1116 } else {
1117 if (low_size != bar_size)
1118 continue;
1119 _hv_pcifront_write_config(hpdev,
1120 PCI_BASE_ADDRESS_0 + (4 * i),
1121 4,
1122 (u32)(low_base & 0xffffff00));

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