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authorJarkko Nikula <jarkko.nikula@nokia.com>2008-11-21 22:39:45 +0100
committerTony Lindgren <tony@atomide.com>2008-11-21 22:39:45 +0100
commitb7af349b175af45f9d87b3bf3f0a221e1831ed39 (patch)
tree7e16c8dcaba34764b9e60e42c437a068c5941601 /drivers/i2c
parentLinux 2.6.28-rc6 (diff)
downloadlinux-b7af349b175af45f9d87b3bf3f0a221e1831ed39.tar.xz
linux-b7af349b175af45f9d87b3bf3f0a221e1831ed39.zip
i2c-omap: Do not use interruptible wait call in omap_i2c_xfer_msg
If there is a signal pending and wait_for_completion_interruptible_timeout terminates with -ERESTARTSYS, we return and disable the i2c clocks in omap_i2c_xfer. If we terminate before sending last i2c message with a stop condition, the bus remains busy and we are not able to send new messages into bus with successive omap_i2c_xfer calls. Therefore a pending signal is not caught here and we return only because of timeout or i2c error. Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com> Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-omap.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 608038d64f81..17476ecd9782 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -328,8 +328,12 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,
w |= OMAP_I2C_CON_STP;
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, w);
- r = wait_for_completion_interruptible_timeout(&dev->cmd_complete,
- OMAP_I2C_TIMEOUT);
+ /*
+ * REVISIT: We should abort the transfer on signals, but the bus goes
+ * into arbitration and we're currently unable to recover from it.
+ */
+ r = wait_for_completion_timeout(&dev->cmd_complete,
+ OMAP_I2C_TIMEOUT);
dev->buf_len = 0;
if (r < 0)
return r;