linux-kernel - [RFC 1/5] i2c: omap: ack only reported events

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Message-Id: <1417617242-16869-2-git-send-email-al.kochet@gmail.com>
Date:	Wed,  3 Dec 2014 18:33:58 +0400
From:	Alexander Kochetkov <al.kochet@...il.com>
To:	Kevin Hilman <khilman@...nel.org>,
	Tony Lindgren <tony@...mide.com>, Felipe Balbi <balbi@...com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Alexander Kochetkov <al.kochet@...il.com>
Cc:	linux-omap@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC 1/5] i2c: omap: ack only reported events

Signed-off-by: Alexander Kochetkov <al.kochet@...il.com>
---
 drivers/i2c/busses/i2c-omap.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 4563200..53b4234 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1059,7 +1059,11 @@ omap_i2c_isr_thread(int this_irq, void *dev_id)
 
 		if (stat & (OMAP_I2C_STAT_ARDY | OMAP_I2C_STAT_NACK |
 					OMAP_I2C_STAT_AL)) {
-			omap_i2c_ack_stat(dev, (OMAP_I2C_STAT_RRDY |
+			/*
+			 * These are pending events not handled in time
+			 * due to ISR latency.
+			 */
+			omap_i2c_ack_stat(dev, stat & (OMAP_I2C_STAT_RRDY |
 						OMAP_I2C_STAT_RDR |
 						OMAP_I2C_STAT_XRDY |
 						OMAP_I2C_STAT_XDR |
-- 
1.7.9.5

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