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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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12
Kernel/Storage/IDEChannel.cpp
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@ -476,12 +476,12 @@ bool IDEChannel::ata_do_read_sector()
dbgln_if(PATA_DEBUG, "IDEChannel::ata_do_read_sector");
auto& request = *m_current_request;
auto out_buffer = request.buffer().offset(m_current_request_block_index * 512);
ssize_t nwritten = request.write_to_buffer_buffered<512>(out_buffer, 512, [&](u8* buffer, size_t buffer_bytes) {
auto result = request.write_to_buffer_buffered<512>(out_buffer, 512, [&](u8* buffer, size_t buffer_bytes) {
for (size_t i = 0; i < buffer_bytes; i += sizeof(u16))
*(u16*)&buffer[i] = IO::in16(m_io_group.io_base().offset(ATA_REG_DATA).get());
return (ssize_t)buffer_bytes;
return buffer_bytes;
});
if (nwritten < 0) {
if (result.is_error()) {
// TODO: Do we need to abort the PATA read if this wasn't the last block?
complete_current_request(AsyncDeviceRequest::MemoryFault);
return false;
@ -518,12 +518,12 @@ void IDEChannel::ata_do_write_sector()
auto in_buffer = request.buffer().offset(m_current_request_block_index * 512);
dbgln_if(PATA_DEBUG, "IDEChannel: Writing 512 bytes (part {}) (status={:#02x})...", m_current_request_block_index, status);
ssize_t nread = request.read_from_buffer_buffered<512>(in_buffer, 512, [&](const u8* buffer, size_t buffer_bytes) {
auto result = request.read_from_buffer_buffered<512>(in_buffer, 512, [&](u8 const* buffer, size_t buffer_bytes) {
for (size_t i = 0; i < buffer_bytes; i += sizeof(u16))
IO::out16(m_io_group.io_base().offset(ATA_REG_DATA).get(), *(const u16*)&buffer[i]);
return (ssize_t)buffer_bytes;
return buffer_bytes;
});
if (nread < 0)
if (result.is_error())
complete_current_request(AsyncDeviceRequest::MemoryFault);
}