These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / firewire / ohci.c

diff --git a/kernel/drivers/firewire/ohci.c b/kernel/drivers/firewire/ohci.c
index f51d376..c2f5117 100644 (file)
--- a/kernel/drivers/firewire/ohci.c
+++ b/kernel/drivers/firewire/ohci.c
@@ -3675,6 +3675,11 @@ static int pci_probe(struct pci_dev *dev,
 
        reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
        ohci->it_context_support = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
+       /* JMicron JMB38x often shows 0 at first read, just ignore it */
+       if (!ohci->it_context_support) {
+               ohci_notice(ohci, "overriding IsoXmitIntMask\n");
+               ohci->it_context_support = 0xf;
+       }
        reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
        ohci->it_context_mask = ohci->it_context_support;
        ohci->n_it = hweight32(ohci->it_context_mask);