i2c-pxa2xx: Don't clear isr bits too early
isr is passed later into i2c_pxa_irq_txempty and
i2c_pxa_irq_rxfull and they may use some other bits
than irq sources.
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index b914184..f59224a 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -966,8 +966,7 @@
struct pxa_i2c *i2c = dev_id;
u32 isr = readl(_ISR(i2c));
- isr &= VALID_INT_SOURCE;
- if (!isr)
+ if (!(isr & VALID_INT_SOURCE))
return IRQ_NONE;
if (i2c_debug > 2 && 0) {
@@ -984,7 +983,7 @@
/*
* Always clear all pending IRQs.
*/
- writel(isr, _ISR(i2c));
+ writel(isr & VALID_INT_SOURCE, _ISR(i2c));
if (isr & ISR_SAD)
i2c_pxa_slave_start(i2c, isr);