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authorDavid Brownell <david-b@pacbell.net>2008-07-14 22:38:25 +0200
committerJean Delvare <khali@mahadeva.delvare>2008-07-14 22:38:25 +0200
commit97140342e69d479a3ad82bfd4c154c0b08fe3eea (patch)
tree2ee2ad225c7e4850a30bc57c4bf07251c1da1085 /drivers/i2c/algos
parenti2c: i2c_use_client() defends against NULL (diff)
downloadlinux-97140342e69d479a3ad82bfd4c154c0b08fe3eea.tar.xz
linux-97140342e69d479a3ad82bfd4c154c0b08fe3eea.zip
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/algos')
-rw-r--r--drivers/i2c/algos/i2c-algo-bit.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index 35812823787b..eb8f72ca02f4 100644
--- a/drivers/i2c/algos/i2c-algo-bit.c
+++ b/drivers/i2c/algos/i2c-algo-bit.c
@@ -320,7 +320,7 @@ static int try_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
struct i2c_algo_bit_data *adap = i2c_adap->algo_data;
- int i, ret = -1;
+ int i, ret = 0;
for (i = 0; i <= retries; i++) {
ret = i2c_outb(i2c_adap, addr);
@@ -508,7 +508,7 @@ static int bit_doAddress(struct i2c_adapter *i2c_adap, struct i2c_msg *msg)
addr ^= 1;
ret = try_address(i2c_adap, addr, retries);
if ((ret != 1) && !nak_ok)
- return -EREMOTEIO;
+ return -ENXIO;
}
return 0;