i2c: pmcmsp: fix error return from master_xfer

BugLink: http://bugs.launchpad.net/bugs/1794889
[ Upstream commit 12d9bbc5a7f347eaa65ff2a9d34995cadc05eb1b ]

Returning -1 (-EPERM) is not appropriate here, go with -EIO.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fixes: 1b144df1d7d6 ("i2c: New PMC MSP71xx TWI bus driver")
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/i2c/busses/i2c-pmcmsp.c b/drivers/i2c/busses/i2c-pmcmsp.c
index ec27e27e8d068fae16ea8cf80bb1e94a18142286..dae8ac618a5221fdd886afab417f88945af7f143 100644 (file)
--- a/drivers/i2c/busses/i2c-pmcmsp.c
+++ b/drivers/i2c/busses/i2c-pmcmsp.c
@@ -564,7 +564,7 @@ static int pmcmsptwi_master_xfer(struct i2c_adapter *adap,
                 * TODO: We could potentially loop and retry in the case
                 * of MSP_TWI_XFER_TIMEOUT.
                 */
-               return -1;
+               return -EIO;
        }
 
        return num;