Hi Alex,
FYI, there are new smatch warnings show up in
tree: git://github.com/awilliam/linux-vfio.git vfio-vga
head: 2c2e21fa66c40ed7b8e434c86a9f2ab0c879f21d
commit: f4d38f216ef420595d12f74b256b3961eb4c3c14 [3/5] vfio-pci: Cleanup BAR
access
New smatch warnings:
drivers/vfio/pci/vfio_pci_rdwr.c:169 vfio_pci_bar_rw() warn: always true
condition '(done >= 0) => (0-u32max >= 0)'
vim +169 drivers/vfio/pci/vfio_pci_rdwr.c
f4d38f21 Alex Williamson 2013-01-16 153 if (!io) {
f4d38f21 Alex Williamson 2013-01-16 154
pci_release_selected_regions(pdev, 1 << bar);
f4d38f21 Alex Williamson 2013-01-16 155 return -ENOMEM;
89e1f7d4 Alex Williamson 2012-07-31 156 }
89e1f7d4 Alex Williamson 2012-07-31 157
f4d38f21 Alex Williamson 2013-01-16 158 vdev->barmap[bar] = io;
f4d38f21 Alex Williamson 2013-01-16 159 } else
89e1f7d4 Alex Williamson 2012-07-31 160 io = vdev->barmap[bar];
89e1f7d4 Alex Williamson 2012-07-31 161
f4d38f21 Alex Williamson 2013-01-16 162 if (bar == vdev->msix_bar) {
f4d38f21 Alex Williamson 2013-01-16 163 x_start =
vdev->msix_offset;
f4d38f21 Alex Williamson 2013-01-16 164 x_end =
vdev->msix_offset + vdev->msix_size;
89e1f7d4 Alex Williamson 2012-07-31 165 }
89e1f7d4 Alex Williamson 2012-07-31 166
f4d38f21 Alex Williamson 2013-01-16 167 done = do_io_rw(io, buf, pos,
count, x_start, x_end, iswrite);
89e1f7d4 Alex Williamson 2012-07-31 168
f4d38f21 Alex Williamson 2013-01-16 @169 if (done >= 0)
f4d38f21 Alex Williamson 2013-01-16 170 *ppos += done;
89e1f7d4 Alex Williamson 2012-07-31 171
89e1f7d4 Alex Williamson 2012-07-31 172 if (bar == PCI_ROM_RESOURCE)
89e1f7d4 Alex Williamson 2012-07-31 173 pci_unmap_rom(pdev, io);
89e1f7d4 Alex Williamson 2012-07-31 174
f4d38f21 Alex Williamson 2013-01-16 175 return done;
89e1f7d4 Alex Williamson 2012-07-31 176 }
---
0-DAY kernel build testing backend Open Source Technology Center
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