rust: iomem: add try_memcpy_fromio method for IoMem<T>

[m-falkowski1]

This patch adds only runtime-checked bindings version of
memcpy_fromio() function prefixed with try_ similarly
to read/write methods of IoMem<T> that is readx and try_readx.

This patch is a dependency of a Samsung Exynos trng driver provided initially in #554.

Changes v3 -> v4:

• Removed unneeded generic parameter specifier
  in favor of type inference rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• Removed unneeded comment rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),

Changes v2 -> v3:

• Error::EINVAL -> EINVAL,

Changes v1 -> v2:

• Fixed naming of function's argument rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• [i8] -> [u8] for input buffer rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• Added as *mut _ and as *const _ if possible rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• Removed count argument to take advantage of slicing rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• IoMem::<SIZE> -> Self rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment),
• Replaced existing size checks with Self::offset_ok_of_val() rust: iomem: add try_memcpy_fromio method for IoMem<T> #681 (comment).

Signed-off-by: Maciej Falkowski [email protected]

[m-falkowski1]

v2 posted.

[m-falkowski1]

Rebased.

[m-falkowski1]

v3 rebased to the newest changes.

[m-falkowski1]

May you please reopen the issue? I messed with github, sorry for the situation.

[wedsonaf]

May you please reopen the issue? I messed with github, sorry for the situation.

I'm getting a message saying that branch was "force-pushed or recreated".

Could you try to:

1. Force push the branch back to b4bffd8
2. Reopen the PR
3. Force push to the latest version

I'm not sure if it will work, but worth a try.

[m-falkowski1]

Thanks :) Worked perfectly

[ojeda]

May you please reopen the issue? I messed with github, sorry for the situation.

A partial outage has just been resolved -- it may have been due to that. There was another one yesterday too, Actions did not work well for me.

[m-falkowski1]

May you please reopen the issue? I messed with github, sorry for the situation.

A partial outage has just been resolved -- it may have been due to that. There was another one yesterday too, Actions did not work well for me.

Seems so, before pushing the branch I had major problems with Github. After the push, the branch did not sync.

[wedsonaf]

May you please reopen the issue? I messed with github, sorry for the situation.

A partial outage has just been resolved -- it may have been due to that. There was another one yesterday too, Actions did not work well for me.

Seems so, before pushing the branch I had major problems with Github. After the push, the branch did not sync.

I was having a hard time posting my second comment. I would push the button and nothing would happen. An outage explains that.