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Kernel: Make File::write() and File::read() return KResultOr<size_t>

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Instead of returning a ssize_t where negative values mean error,
we now return KResultOr<size_t> and use the error state to report
errors exclusively.
This commit is contained in:
Andreas Kling 2020-08-04 18:02:23 +02:00
parent 58feebeed2
commit 7a3ab6c517
58 changed files with 223 additions and 229 deletions
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4
Kernel/Devices/SB16.cpp
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@ -172,7 +172,7 @@ bool SB16::can_read(const FileDescription&, size_t) const
return false;
}
ssize_t SB16::read(FileDescription&, size_t, u8*, ssize_t)
KResultOr<size_t> SB16::read(FileDescription&, size_t, u8*, size_t)
{
return 0;
}
@ -226,7 +226,7 @@ void SB16::wait_for_irq()
disable_irq();
}
ssize_t SB16::write(FileDescription&, size_t, const u8* data, ssize_t length)
KResultOr<size_t> SB16::write(FileDescription&, size_t, const u8* data, size_t length)
{
if (!m_dma_region) {
auto page = MM.allocate_supervisor_physical_page();