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| author | Jarkko Nikula <jarkko.nikula@nokia.com> | 2008-11-21 13:39:45 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2008-11-21 13:39:45 -0800 |
| commit | b7af349b175af45f9d87b3bf3f0a221e1831ed39 (patch) | |
| tree | 7e16c8dcaba34764b9e60e42c437a068c5941601 /drivers/i2c | |
| parent | 13d428afc007fcfcd6deeb215618f54cf9c0cae6 (diff) | |
| download | linux-b7af349b175af45f9d87b3bf3f0a221e1831ed39.tar.gz linux-b7af349b175af45f9d87b3bf3f0a221e1831ed39.tar.bz2 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.c | 8 |
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; |