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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);
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);
reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
ohci->it_context_mask = ohci->it_context_support;
ohci->n_it = hweight32(ohci->it_context_mask);