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-rw-r--r--drivers/firewire/ohci.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 276324d741df..0031ec6e1f00 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1790,8 +1790,12 @@ static irqreturn_t irq_handler(int irq, void *data)
if (!event || !~event)
return IRQ_NONE;
- /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */
- reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset);
+ /*
+ * busReset and postedWriteErr must not be cleared yet
+ * (OHCI 1.1 clauses 7.2.3.2 and 13.2.8.1)
+ */
+ reg_write(ohci, OHCI1394_IntEventClear,
+ event & ~(OHCI1394_busReset | OHCI1394_postedWriteErr));
log_irqs(event);
if (event & OHCI1394_selfIDComplete)
@@ -1831,8 +1835,13 @@ static irqreturn_t irq_handler(int irq, void *data)
fw_error("Register access failure - "
"please notify linux1394-devel@lists.sf.net\n");
- if (unlikely(event & OHCI1394_postedWriteErr))
+ if (unlikely(event & OHCI1394_postedWriteErr)) {
+ reg_read(ohci, OHCI1394_PostedWriteAddressHi);
+ reg_read(ohci, OHCI1394_PostedWriteAddressLo);
+ reg_write(ohci, OHCI1394_IntEventClear,
+ OHCI1394_postedWriteErr);
fw_error("PCI posted write error\n");
+ }
if (unlikely(event & OHCI1394_cycleTooLong)) {
if (printk_ratelimit())