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* The adjusted capacity was one block too short.

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* Added debug output to test_capacity().
* Minor other cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36990 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2010-06-01 14:34:51 +00:00
parent 8e8739eb3c
commit 8b5a01bb4d
1 changed files with 16 additions and 7 deletions
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23
src/add-ons/kernel/drivers/disk/scsi/scsi_cd/scsi_cd.cpp
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@ -96,6 +96,12 @@ test_capacity(cd_driver_info *info)
const uint32 blockSize = info->block_size;
const size_t kBufferSize = blockSize * 4;
TRACE("test_capacity: read with buffer size %" B_PRIuSIZE ", block size %"
B_PRIu32", capacity %llu\n", kBufferSize, blockSize,
info->original_capacity);
info->capacity = info->original_capacity;
size_t numBlocks = B_PAGE_SIZE / blockSize;
uint64 offset = info->original_capacity;
if (offset <= numBlocks)
@ -133,14 +139,16 @@ test_capacity(cd_driver_info *info)
// Read close to the end of the device to find out its real end
info->capacity = info->original_capacity;
// Only try 1 second before the end (= 75 blocks)
while (offset > info->original_capacity - 75) {
size_t bytesTransferred;
status_t status = sSCSIPeripheral->read_write(info->scsi_periph_device,
request, offset, numBlocks, entries, numEntries, false,
&bytesTransferred);
TRACE("test_capacity: read from offset %llu: %s\n", offset,
strerror(status));
if (status == B_OK || (request->sense[0] & 0x7f) != 0x70)
break;
@ -154,7 +162,7 @@ test_capacity(cd_driver_info *info)
| (request->sense[4] << 16U) | (request->sense[5] << 8U)
| request->sense[6];
if (errorBlock >= offset)
info->capacity = errorBlock - 1;
info->capacity = errorBlock;
break;
}
@ -1013,7 +1021,7 @@ cd_set_capacity(cd_driver_info* info, uint64 capacity, uint32 blockSize)
info->block_size = blockSize;
}
if (info->original_capacity != capacity) {
if (info->original_capacity != capacity && info->io_scheduler != NULL) {
info->original_capacity = capacity;
// For CDs, it's obviously relatively normal that they report a larger
@ -1021,8 +1029,7 @@ cd_set_capacity(cd_driver_info* info, uint64 capacity, uint32 blockSize)
// correct the value here.
test_capacity(info);
if (info->io_scheduler != NULL)
info->io_scheduler->SetDeviceCapacity(info->capacity * blockSize);
info->io_scheduler->SetDeviceCapacity(info->capacity * blockSize);
}
}
@ -1031,8 +1038,9 @@ static void
cd_media_changed(cd_driver_info* info, scsi_ccb* request)
{
// do a capacity check
// TBD: is this a good idea (e.g. if this is an empty CD)?
// TODO: is this a good idea (e.g. if this is an empty CD)?
info->original_capacity = 0;
info->capacity = 0;
sSCSIPeripheral->check_capacity(info->scsi_periph_device, request);
if (info->io_scheduler != NULL)
@ -1138,6 +1146,7 @@ cd_init_driver(device_node* node, void** _cookie)
info->removable = removable;
// set capacity to zero, so it get checked on first opened handle
info->original_capacity = 0;
info->capacity = 0;
info->block_size = 0;