Increase attribute read buffer space

[hannesweisbach]

PR Description

When reading an attribute a buffer of size 1024 bytes is used by the python bindings of libiio (iio.py:762). This is not enough space for large attributes, such as gain_table_config of an AD9361 ('ad9361-phy'), which is 1688 bytes. This PR increases the buffer size to 4096 bytes.

This is a bit of a brute-force solution. Ideally, iiod would be able to inform the caller of the required buffer space, or the caller could use an incrementally growing buffer. I think the simple solution of using a larger buffer is ok though.

PR Type

• [x] Bug fix (a change that fixes an issue) - Fixes #1156
• [ ] New feature (a change that adds new functionality)
• [ ] Breaking change (a change that affects other repos or cause CIs to fail)

PR Checklist

• [ ] I have conducted a self-review of my own code changes
• [ ] I have commented new code, particulary complex or unclear areas
• [ ] I have checked that I did not intoduced new warnings or errors (CI output)
• [ ] I have checked that components that use libiio did not get broken
• [ ] I have updated the documentation accordingly (GitHub Pages, READMEs, etc)

[mhennerich]

DCO with USER@users.noreply.github.com does not qualify - we need a proper email address which doesn't bounce!

[hannesweisbach]

I used the Github Web-IDE to make this change. I didn't even notice the mail address (I think it was even just a checkbox?). How do I fix it?

[mhennerich]

I used the Github Web-IDE to make this change. I didn't even notice the mail address (I think it was even just a checkbox?). How do I fix it?

Welll, it's already merged - so without rewriting the history we can't fix the commit. Please provide your signed-off-by tag here ...

[hannesweisbach]

Signed-off by: Hannes Weisbach weisbach@neosat.de

[mhennerich]

Thanks!

[hannesweisbach]

No worries. I guess I won't use the Web IDE in the future, though ...