diff options
Diffstat (limited to 'drivers/usb/storage/usb.c')
| -rw-r--r-- | drivers/usb/storage/usb.c | 98 |
1 files changed, 63 insertions, 35 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 9de988a0f856..ef2d8cde6ef7 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -1,4 +1,5 @@ -/* Driver for USB Mass Storage compliant devices +/* + * Driver for USB Mass Storage compliant devices * * Current development and maintenance by: * (c) 1999-2003 Matthew Dharm (mdharm-usb@one-eyed-alien.net) @@ -97,7 +98,8 @@ MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); * with the entries in usb_storage_usb_ids[], defined in usual-tables.c. */ -/* The vendor name should be kept at eight characters or less, and +/* + *The vendor name should be kept at eight characters or less, and * the product name should be kept at 16 characters or less. If a device * has the US_FL_FIX_INQUIRY flag, then the vendor and product names * normally generated by a device through the INQUIRY response will be @@ -191,8 +193,10 @@ int usb_stor_suspend(struct usb_interface *iface, pm_message_t message) if (us->suspend_resume_hook) (us->suspend_resume_hook)(us, US_SUSPEND); - /* When runtime PM is working, we'll set a flag to indicate - * whether we should autoresume when a SCSI request arrives. */ + /* + * When runtime PM is working, we'll set a flag to indicate + * whether we should autoresume when a SCSI request arrives. + */ mutex_unlock(&us->dev_mutex); return 0; @@ -220,8 +224,10 @@ int usb_stor_reset_resume(struct usb_interface *iface) /* Report the reset to the SCSI core */ usb_stor_report_bus_reset(us); - /* FIXME: Notify the subdrivers that they need to reinitialize - * the device */ + /* + * FIXME: Notify the subdrivers that they need to reinitialize + * the device + */ return 0; } EXPORT_SYMBOL_GPL(usb_stor_reset_resume); @@ -250,8 +256,10 @@ int usb_stor_post_reset(struct usb_interface *iface) /* Report the reset to the SCSI core */ usb_stor_report_bus_reset(us); - /* FIXME: Notify the subdrivers that they need to reinitialize - * the device */ + /* + * FIXME: Notify the subdrivers that they need to reinitialize + * the device + */ mutex_unlock(&us->dev_mutex); return 0; @@ -274,15 +282,17 @@ void fill_inquiry_response(struct us_data *us, unsigned char *data, return; memset(data+8, ' ', 28); - if (data[0]&0x20) { /* USB device currently not connected. Return - peripheral qualifier 001b ("...however, the - physical device is not currently connected - to this logical unit") and leave vendor and - product identification empty. ("If the target - does store some of the INQUIRY data on the - device, it may return zeros or ASCII spaces - (20h) in those fields until the data is - available from the device."). */ + if (data[0]&0x20) { /* + * USB device currently not connected. Return + * peripheral qualifier 001b ("...however, the + * physical device is not currently connected + * to this logical unit") and leave vendor and + * product identification empty. ("If the target + * does store some of the INQUIRY data on the + * device, it may return zeros or ASCII spaces + * (20h) in those fields until the data is + * available from the device."). + */ } else { u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); int n; @@ -336,7 +346,8 @@ static int usb_stor_control_thread(void * __us) scsi_unlock(host); - /* reject the command if the direction indicator + /* + * reject the command if the direction indicator * is UNKNOWN */ if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { @@ -344,7 +355,8 @@ static int usb_stor_control_thread(void * __us) us->srb->result = DID_ERROR << 16; } - /* reject if target != 0 or if LUN is higher than + /* + * reject if target != 0 or if LUN is higher than * the maximum known LUN */ else if (us->srb->device->id && @@ -362,8 +374,10 @@ static int usb_stor_control_thread(void * __us) us->srb->result = DID_BAD_TARGET << 16; } - /* Handle those devices which need us to fake - * their inquiry data */ + /* + * Handle those devices which need us to fake + * their inquiry data + */ else if ((us->srb->cmnd[0] == INQUIRY) && (us->fflags & US_FL_FIX_INQUIRY)) { unsigned char data_ptr[36] = { @@ -395,11 +409,13 @@ SkipForAbort: usb_stor_dbg(us, "scsi command aborted\n"); } - /* If an abort request was received we need to signal that + /* + * If an abort request was received we need to signal that * the abort has finished. The proper test for this is * the TIMED_OUT flag, not srb->result == DID_ABORT, because * the timeout might have occurred after the command had - * already completed with a different result code. */ + * already completed with a different result code. + */ if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { complete(&(us->notify)); @@ -610,7 +626,8 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id, le16_to_cpu(dev->descriptor.idProduct), us->fflags); - /* Log a message if a non-generic unusual_dev entry contains an + /* + * Log a message if a non-generic unusual_dev entry contains an * unnecessary subclass or protocol override. This may stimulate * reports from users that will help us remove unneeded entries * from the unusual_devs.h table. @@ -782,8 +799,10 @@ static int usb_stor_acquire_resources(struct us_data *us) return -ENOMEM; } - /* Just before we start our control thread, initialize - * the device if it needs initialization */ + /* + * Just before we start our control thread, initialize + * the device if it needs initialization + */ if (us->unusual_dev->initFunction) { p = us->unusual_dev->initFunction(us); if (p) @@ -805,7 +824,8 @@ static int usb_stor_acquire_resources(struct us_data *us) /* Release all our dynamic resources */ static void usb_stor_release_resources(struct us_data *us) { - /* Tell the control thread to exit. The SCSI host must + /* + * Tell the control thread to exit. The SCSI host must * already have been removed and the DISCONNECTING flag set * so that we won't accept any more commands. */ @@ -836,7 +856,8 @@ static void dissociate_dev(struct us_data *us) usb_set_intfdata(us->pusb_intf, NULL); } -/* First stage of disconnect processing: stop SCSI scanning, +/* + * First stage of disconnect processing: stop SCSI scanning, * remove the host, and stop accepting new commands */ static void quiesce_and_remove_host(struct us_data *us) @@ -849,7 +870,8 @@ static void quiesce_and_remove_host(struct us_data *us) wake_up(&us->delay_wait); } - /* Prevent SCSI scanning (if it hasn't started yet) + /* + * Prevent SCSI scanning (if it hasn't started yet) * or wait for the SCSI-scanning routine to stop. */ cancel_delayed_work_sync(&us->scan_dwork); @@ -858,12 +880,14 @@ static void quiesce_and_remove_host(struct us_data *us) if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags)) usb_autopm_put_interface_no_suspend(us->pusb_intf); - /* Removing the host will perform an orderly shutdown: caches + /* + * Removing the host will perform an orderly shutdown: caches * synchronized, disks spun down, etc. */ scsi_remove_host(host); - /* Prevent any new commands from being accepted and cut short + /* + * Prevent any new commands from being accepted and cut short * reset delays. */ scsi_lock(host); @@ -878,8 +902,10 @@ static void release_everything(struct us_data *us) usb_stor_release_resources(us); dissociate_dev(us); - /* Drop our reference to the host; the SCSI core will free it - * (and "us" along with it) when the refcount becomes 0. */ + /* + * Drop our reference to the host; the SCSI core will free it + * (and "us" along with it) when the refcount becomes 0. + */ scsi_host_put(us_to_host(us)); } @@ -900,7 +926,8 @@ static void usb_stor_scan_dwork(struct work_struct *work) us->max_lun = usb_stor_Bulk_max_lun(us); /* * Allow proper scanning of devices that present more than 8 LUNs - * While not affecting other devices that may need the previous behavior + * While not affecting other devices that may need the previous + * behavior */ if (us->max_lun >= 8) us_to_host(us)->max_lun = us->max_lun+1; @@ -975,7 +1002,8 @@ int usb_stor_probe1(struct us_data **pus, get_transport(us); get_protocol(us); - /* Give the caller a chance to fill in specialized transport + /* + * Give the caller a chance to fill in specialized transport * or protocol settings. */ return 0; |