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GenWQE: Check pci_get_totalvfs return code
Currently the driver is using the pci_get_totalvfs() return code directly in a loop. To avoid problems with potentially negative returns in case of errors, we are adding some more sanity checking code. Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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2 changed files with 9 additions and 2 deletions
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@ -346,8 +346,13 @@ static bool genwqe_setup_vf_jtimer(struct genwqe_dev *cd)
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unsigned int vf;
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u32 T = genwqe_T_psec(cd);
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u64 x;
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int totalvfs;
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for (vf = 0; vf < pci_sriov_get_totalvfs(pci_dev); vf++) {
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totalvfs = pci_sriov_get_totalvfs(pci_dev);
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if (totalvfs <= 0)
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return false;
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for (vf = 0; vf < totalvfs; vf++) {
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if (cd->vf_jobtimeout_msec[vf] == 0)
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continue;
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@ -1125,6 +1130,8 @@ static int genwqe_pci_setup(struct genwqe_dev *cd)
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}
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cd->num_vfs = pci_sriov_get_totalvfs(pci_dev);
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if (cd->num_vfs < 0)
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cd->num_vfs = 0;
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err = genwqe_read_ids(cd);
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if (err)
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@ -306,7 +306,7 @@ struct genwqe_dev {
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struct pci_dev *pci_dev; /* PCI device */
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void __iomem *mmio; /* BAR-0 MMIO start */
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unsigned long mmio_len;
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u16 num_vfs;
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int num_vfs;
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u32 vf_jobtimeout_msec[GENWQE_MAX_VFS];
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int is_privileged; /* access to all regs possible */
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