From 0e384cf3030e0b6d28fc0313a6c80538dd30d0c1 Mon Sep 17 00:00:00 2001 From: Georgii Staroselskii Date: Fri, 23 Nov 2018 09:40:26 +0100 Subject: py-smbus: Fix i2c_smbus_* error propagation The Python bindings haven't been updated after commit 330bba29f3d02432e2dca6f85082763b248887ff ("libi2c: Properly propagate real error codes on read errors"). This led to erronenous behavior every time an error other than -1 is returned by i2c_smbus_* functions. [JD: Edited description.] Signed-off-by: Georgii Staroselskii Signed-off-by: Jean Delvare --- CHANGES | 1 + py-smbus/smbusmodule.c | 14 +++++++------- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/CHANGES b/CHANGES index 8a39f19..d1b9889 100644 --- a/CHANGES +++ b/CHANGES @@ -11,6 +11,7 @@ master Documentation update for DDR4 Verify the CRC of DDR4 data block 1 eeprog: Fix ambiguous parentheses + py-smbus: Fix i2c_smbus_* error propagation 4.0 (2017-10-30) tools: Fix build with recent compilers (gcc 4.6+) diff --git a/py-smbus/smbusmodule.c b/py-smbus/smbusmodule.c index b189106..34af992 100644 --- a/py-smbus/smbusmodule.c +++ b/py-smbus/smbusmodule.c @@ -216,7 +216,7 @@ SMBus_read_byte(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); - if ((result = i2c_smbus_read_byte(self->fd)) == -1) { + if ((result = i2c_smbus_read_byte(self->fd)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -239,7 +239,7 @@ SMBus_write_byte(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); - if ((result = i2c_smbus_write_byte(self->fd, (__u8)val)) == -1) { + if ((result = i2c_smbus_write_byte(self->fd, (__u8)val)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -263,7 +263,7 @@ SMBus_read_byte_data(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); - if ((result = i2c_smbus_read_byte_data(self->fd, (__u8)cmd)) == -1) { + if ((result = i2c_smbus_read_byte_data(self->fd, (__u8)cmd)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -287,7 +287,7 @@ SMBus_write_byte_data(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); if ((result = i2c_smbus_write_byte_data(self->fd, - (__u8)cmd, (__u8)val)) == -1) { + (__u8)cmd, (__u8)val)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -311,7 +311,7 @@ SMBus_read_word_data(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); - if ((result = i2c_smbus_read_word_data(self->fd, (__u8)cmd)) == -1) { + if ((result = i2c_smbus_read_word_data(self->fd, (__u8)cmd)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -335,7 +335,7 @@ SMBus_write_word_data(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); if ((result = i2c_smbus_write_word_data(self->fd, - (__u8)cmd, (__u16)val)) == -1) { + (__u8)cmd, (__u16)val)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } @@ -360,7 +360,7 @@ SMBus_process_call(SMBus *self, PyObject *args) SMBus_SET_ADDR(self, addr); if ((result = i2c_smbus_process_call(self->fd, - (__u8)cmd, (__u16)val)) == -1) { + (__u8)cmd, (__u16)val)) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } -- cgit v1.2.1