Claude review: drm/radeon: fix integer overflow in radeon_align_pitch()

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Same fix, same analysis.** The radeon variant is structurally identical:

```c
/* Guard against integer overflow in aligned * cpp. */
if (aligned > INT_MAX / (cpp ? cpp : 1) || aligned <= 0)
    return 0;
```

And the caller checks:
```c
if (!args->pitch)
    return -EINVAL;
...
if (!args->size)
    return -EINVAL;
```

The only functional difference is that `radeon_align_pitch()` has slightly different alignment masks (e.g., `pitch_mask = align_large ? 255 : 127` for cpp=1) which doesn't change the overflow risk.

**Fixes tag:** Points to `ff72145badb8 ("drm: dumb scanout create/mmap for intel/radeon (v3)")` which originally introduced `radeon_mode_dumb_create()`. This is correct -- the vulnerability has existed since the function was first written.

**Same redundancy note** about `!args->size` applies here as well.

**Verdict: Looks correct. Same quality as patch 1.**

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Generated by Claude Code Patch Reviewer