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s390x/pci: refactor s390_pci_find_dev_by_fh

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Because this function is called very frequently, we should use a more
effective way to find the zpci device. So we use the FH's index to get
the device directly.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2016-05-12 14:27:25 +08:00 committed by Cornelia Huck
parent c188e30315
commit 06a96dae11
1 changed files with 4 additions and 11 deletions
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15
hw/s390x/s390-pci-bus.c
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@ -198,19 +198,12 @@ S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
{
S390PCIBusDevice *pbdev;
int i;
S390pciState *s = s390_get_phb();
S390PCIBusDevice *pbdev;
if (!fh) {
return NULL;
}
for (i = 0; i < PCI_SLOT_MAX; i++) {
pbdev = &s->pbdev[i];
if (pbdev->fh == fh) {
return pbdev;
}
pbdev = &s->pbdev[fh & FH_MASK_INDEX];
if (pbdev->fh != 0 && pbdev->fh == fh) {
return pbdev;
}
return NULL;