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AHCI: use a minimum of 1 block for trim ranges.

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* Word 105 of ATA IDENTIFY should contain the maximum number of block
  ranges the device supports, but it always supports at least a single
  one.
* This change lets the trim command do something on Virtual Box.
This commit is contained in:
Axel Dörfler
2014-06-11 00:56:09 +02:00
parent c57c62505e
commit bc4db40c40
1 changed files with 3 additions and 0 deletions
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src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp
+3
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@@ -623,6 +623,9 @@ AHCIPort::ScsiInquiry(scsi_ccb* request)
fUse48BitCommands, ataData.lba_sector_count, fUse48BitCommands, ataData.lba_sector_count,
ataData.lba48_sector_count, fSectorCount * fSectorSize); ataData.lba48_sector_count, fSectorCount * fSectorSize);
if (fTrimSupported) { if (fTrimSupported) {
if (fMaxTrimRangeBlocks == 0)
fMaxTrimRangeBlocks = 1;
bool deterministic = ataData.supports_deterministic_read_after_trim; bool deterministic = ataData.supports_deterministic_read_after_trim;
TRACE("trim supported, %" B_PRIu32 " ranges blocks, reads are " TRACE("trim supported, %" B_PRIu32 " ranges blocks, reads are "
"%sdeterministic%s.\n", fMaxTrimRangeBlocks, "%sdeterministic%s.\n", fMaxTrimRangeBlocks,