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-rw-r--r--drivers/i2c/busses/scx200_acb.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index 42e4e00d6c3..a140e4536a4 100644
--- a/drivers/i2c/busses/scx200_acb.c
+++ b/drivers/i2c/busses/scx200_acb.c
@@ -133,6 +133,9 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
outb(ACBST_STASTR | ACBST_NEGACK, ACBST);
+
+ /* Reset the status register */
+ outb(0, ACBST);
return;
}
@@ -228,6 +231,10 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface)
timeout = jiffies + POLL_TIMEOUT;
while (time_before(jiffies, timeout)) {
status = inb(ACBST);
+
+ /* Reset the status register to avoid the hang */
+ outb(0, ACBST);
+
if ((status & (ACBST_SDAST|ACBST_BER|ACBST_NEGACK)) != 0) {
scx200_acb_machine(iface, status);
return;