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Kernel: Make UserOrKernelBuffer R/W helpers return KResultOr<size_t>

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This makes error propagation less cumbersome (and also exposed some
places where we were not doing it.)
This commit is contained in:
Andreas Kling 2021-05-13 09:08:44 +02:00
parent 25a45e639a
commit e46343bf9a
15 changed files with 64 additions and 85 deletions
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7
Kernel/Devices/RandomDevice.cpp
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@ -25,13 +25,10 @@ bool RandomDevice::can_read(const FileDescription&, size_t) const
KResultOr<size_t> RandomDevice::read(FileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
{
bool success = buffer.write_buffered<256>(size, [&](u8* data, size_t data_size) {
return buffer.write_buffered<256>(size, [&](u8* data, size_t data_size) {
get_good_random_bytes(data, data_size);
return (ssize_t)data_size;
return data_size;
});
if (!success)
return EFAULT;
return size;
}
KResultOr<size_t> RandomDevice::write(FileDescription&, u64, const UserOrKernelBuffer&, size_t size)