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3 Commits

Author SHA1 Message Date
Gustavo A. R. Silva
dd92d5ea20 iio: multiplexer: add NULL check on devm_kzalloc() and devm_kmemdup() return values 
Check return values from call to devm_kzalloc() and devm_kmemup()
in order to prevent a NULL pointer dereference.

This issue was detected using Coccinelle and the following semantic patch:

@@
expression x;
identifier fld;
@@

* x = devm_kzalloc(...);
   ... when != x == NULL
   x->fld

Fixes: 7ba9df54b0 ("iio: multiplexer: new iio category and iio-mux driver")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2017-09-03 18:10:29 +01:00
Jonathan Cameron
873f389433 iio: multiplexer: drop the manual assignment of THIS_MODULE 
This is now done through some macro magic by the core.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Peter Rosin <peda@axentia.se>
 2017-09-03 18:10:24 +01:00
Peter Rosin
7ba9df54b0 iio: multiplexer: new iio category and iio-mux driver 
When a multiplexer changes how an iio device behaves (for example
by feeding different signals to an ADC), this driver can be used
to create one virtual iio channel for each multiplexer state.

Depends on the generic multiplexer subsystem.

Cache any ext_info values from the parent iio channel, creating a private
copy of the ext_info attributes for each multiplexer state/channel.

Reviewed-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-06-03 19:29:26 +09:00