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read_write(): Consider a request created from an io_operation DMA safe. This

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saves some checking in the bus manager.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37199 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2010-06-21 16:19:49 +00:00
parent 1043be1d7c
commit 02507604e7
1 changed files with 5 additions and 0 deletions
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5
src/add-ons/kernel/generic/scsi_periph/io.cpp
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@ -123,6 +123,11 @@ read_write(scsi_periph_device_info *device, scsi_ccb *request,
request->flags = isWrite ? SCSI_DIR_OUT : SCSI_DIR_IN;
// io_operations are generated by a DMAResource and thus contain DMA
// safe physical vectors
if (operation != NULL)
request->flags |= SCSI_DMA_SAFE;
// make sure we avoid 10 byte commands if they aren't supported
if (!device->rw10_enabled || device->preferred_ccb_size == 6) {
// restricting transfer is OK - the block manager will