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Implement a downcounter for the synchronize cache command. There are devices 

that do not support it (probably because they do not have a cache at all like
in flash media) and this should at least avoid spamming the syslog when this is
the case. It will try 5 times and then disable syncing for that device. Untested
as of yet though.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24803 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2008-04-04 23:46:14 +00:00
parent 0ee109102b
commit f1a9c3c214
2 changed files with 15 additions and 0 deletions
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12
src/add-ons/kernel/drivers/disk/usb/usb_disk/usb_disk.cpp
View File

@ -436,10 +436,21 @@ usb_disk_update_capacity(device_lun *lun)
status_t
usb_disk_synchronize(device_lun *lun, bool force)
{
if (lun->device->sync_support == 0) {
// this device repeatedly reported an illegal request when syncing
// it obviously does really not support this command...
return B_UNSUPPORTED;
}
if (lun->should_sync || force) {
status_t result = usb_disk_operation(lun, SCSI_SYNCHRONIZE_CACHE_10,
10, 0, 0, NULL, NULL, false);
lun->should_sync = false;
if (result == B_OK)
lun->device->sync_support = SYNC_SUPPORT_RELOAD;
else if (result == B_DEV_INVALID_IOCTL)
lun->device->sync_support--;
return result;
}
@ -474,6 +485,7 @@ usb_disk_device_added(usb_device newDevice, void **cookie)
device->open_count = 0;
device->interface = 0xff;
device->current_tag = 0;
device->sync_support = SYNC_SUPPORT_RELOAD;
device->luns = NULL;
// scan through the interfaces to find our bulk-only data interface

3
src/add-ons/kernel/drivers/disk/usb/usb_disk/usb_disk.h
View File

@ -25,6 +25,8 @@
#define CSW_STATUS_COMMAND_FAILED 0x01
#define CSW_STATUS_PHASE_ERROR 0x02
#define SYNC_SUPPORT_RELOAD 5
typedef struct device_lun_s device_lun;
// holds common information about an attached device (pointed to by luns)
@ -40,6 +42,7 @@ typedef struct disk_device_s {
usb_pipe bulk_out;
uint8 interface;
uint32 current_tag;
uint8 sync_support;
// used to store callback information
sem_id notify;