uas: Drop inflight list

We've the same info doubled in both the inflight list and the cmnd array,
drop the list.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 7daecd5..06c3eae 100644 (file)
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -61,7 +61,6 @@ struct uas_dev_info {
        struct scsi_cmnd *cmnd[MAX_CMNDS];
        spinlock_t lock;
        struct work_struct work;
-       struct list_head inflight_list;
 };
 
 enum {
@@ -87,7 +86,6 @@ struct uas_cmd_info {
        struct urb *cmd_urb;
        struct urb *data_in_urb;
        struct urb *data_out_urb;
-       struct list_head list;
 };
 
 /* I hate forward declarations, but I actually have a loop */
@@ -103,18 +101,21 @@ static void uas_do_work(struct work_struct *work)
        struct uas_dev_info *devinfo =
                container_of(work, struct uas_dev_info, work);
        struct uas_cmd_info *cmdinfo;
+       struct scsi_cmnd *cmnd;
        unsigned long flags;
-       int err;
+       int i, err;
 
        spin_lock_irqsave(&devinfo->lock, flags);
 
        if (devinfo->resetting)
                goto out;
 
-       list_for_each_entry(cmdinfo, &devinfo->inflight_list, list) {
-               struct scsi_pointer *scp = (void *)cmdinfo;
-               struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
-                                                     SCp);
+       for (i = 0; i < devinfo->qdepth; i++) {
+               if (!devinfo->cmnd[i])
+                       continue;
+
+               cmnd = devinfo->cmnd[i];
+               cmdinfo = (void *)&cmnd->SCp;
 
                if (!(cmdinfo->state & IS_IN_WORK_LIST))
                        continue;
@@ -143,15 +144,17 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
 static void uas_zap_pending(struct uas_dev_info *devinfo, int result)
 {
        struct uas_cmd_info *cmdinfo;
-       struct uas_cmd_info *temp;
+       struct scsi_cmnd *cmnd;
        unsigned long flags;
-       int err;
+       int i, err;
 
        spin_lock_irqsave(&devinfo->lock, flags);
-       list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, list) {
-               struct scsi_pointer *scp = (void *)cmdinfo;
-               struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
-                                                     SCp);
+       for (i = 0; i < devinfo->qdepth; i++) {
+               if (!devinfo->cmnd[i])
+                       continue;
+
+               cmnd = devinfo->cmnd[i];
+               cmdinfo = (void *)&cmnd->SCp;
                uas_log_cmd_state(cmnd, __func__);
                /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */
                cmdinfo->state &= ~COMMAND_INFLIGHT;
@@ -260,7 +263,6 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
        cmdinfo->state |= COMMAND_COMPLETED;
        if (cmdinfo->state & COMMAND_ABORTED)
                scmd_printk(KERN_INFO, cmnd, "abort completed\n");
-       list_del(&cmdinfo->list);
        devinfo->cmnd[uas_get_tag(cmnd) - 1] = NULL;
        cmnd->scsi_done(cmnd);
        return 0;
@@ -707,7 +709,6 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
        }
 
        devinfo->cmnd[stream - 1] = cmnd;
-       list_add_tail(&cmdinfo->list, &devinfo->inflight_list);
        spin_unlock_irqrestore(&devinfo->lock, flags);
        return 0;
 }
@@ -921,7 +922,6 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
        init_usb_anchor(&devinfo->data_urbs);
        spin_lock_init(&devinfo->lock);
        INIT_WORK(&devinfo->work, uas_do_work);
-       INIT_LIST_HEAD(&devinfo->inflight_list);
 
        result = uas_configure_endpoints(devinfo);
        if (result)