diff options
| author | David Brownell <david-b@pacbell.net> | 2008-07-14 22:38:25 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-07-14 22:38:25 +0200 |
| commit | 97140342e69d479a3ad82bfd4c154c0b08fe3eea (patch) | |
| tree | 2ee2ad225c7e4850a30bc57c4bf07251c1da1085 /drivers/i2c/busses/i2c-stub.c | |
| parent | 6ea438ec8da4ec56bf415f5ea360e6b0cb59c6c3 (diff) | |
i2c: Bus drivers return -Errno not -1
Tighten error paths used by various i2c adapters (mostly x86) so
they return real fault/errno codes instead of a "-1" (which is
most often interpreted as "-EPERM"). Build tested, with eyeball
review.
One minor initial goal is to have adapters consistently return
the code "-ENXIO" when addressing a device doesn't get an ACK
response, at least in the probe paths where they are already
good at stifling related logspam.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-stub.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-stub.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-stub.c b/drivers/i2c/busses/i2c-stub.c index d08eeec5391..e37ccd80f77 100644 --- a/drivers/i2c/busses/i2c-stub.c +++ b/drivers/i2c/busses/i2c-stub.c @@ -43,7 +43,7 @@ struct stub_chip { static struct stub_chip *stub_chips; -/* Return -1 on error. */ +/* Return negative errno on error. */ static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data * data) { @@ -120,7 +120,7 @@ static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags, default: dev_dbg(&adap->dev, "Unsupported I2C/SMBus command\n"); - ret = -1; + ret = -EOPNOTSUPP; break; } /* switch (size) */ |