ALSA: wm8750: add missing VREF output

[linux-2.6] / drivers / scsi / scsi.c

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 749c9c7fc2e1ae3db016a9eafcbdc791960997bf..ee6be596503d1515dc855e6e5715267ac4edb4e1 100644 (file)
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -78,15 +78,6 @@ static void scsi_done(struct scsi_cmnd *cmd);
 /* Do not call reset on error if we just did a reset within 15 sec. */
 #define MIN_RESET_PERIOD (15*HZ)
 
-/*
- * Macro to determine the size of SCSI command. This macro takes vendor
- * unique commands into account. SCSI commands in groups 6 and 7 are
- * vendor unique and we will depend upon the command length being
- * supplied correctly in cmd_len.
- */
-#define CDB_SIZE(cmd)  (((((cmd)->cmnd[0] >> 5) & 7) < 6) ? \
-                               COMMAND_SIZE((cmd)->cmnd[0]) : (cmd)->cmd_len)
-
 /*
  * Note - the initial logging level can be set here to log events at boot time.
  * After the system is up, you may enable logging via the /proc interface.
@@ -206,10 +197,42 @@ static void
 scsi_pool_free_command(struct scsi_host_cmd_pool *pool,
                         struct scsi_cmnd *cmd)
 {
+       if (cmd->prot_sdb)
+               kmem_cache_free(scsi_sdb_cache, cmd->prot_sdb);
+
        kmem_cache_free(pool->sense_slab, cmd->sense_buffer);
        kmem_cache_free(pool->cmd_slab, cmd);
 }
 
+/**
+ * scsi_host_alloc_command - internal function to allocate command
+ * @shost:     SCSI host whose pool to allocate from
+ * @gfp_mask:  mask for the allocation
+ *
+ * Returns a fully allocated command with sense buffer and protection
+ * data buffer (where applicable) or NULL on failure
+ */
+static struct scsi_cmnd *
+scsi_host_alloc_command(struct Scsi_Host *shost, gfp_t gfp_mask)
+{
+       struct scsi_cmnd *cmd;
+
+       cmd = scsi_pool_alloc_command(shost->cmd_pool, gfp_mask);
+       if (!cmd)
+               return NULL;
+
+       if (scsi_host_get_prot(shost) >= SHOST_DIX_TYPE0_PROTECTION) {
+               cmd->prot_sdb = kmem_cache_zalloc(scsi_sdb_cache, gfp_mask);
+
+               if (!cmd->prot_sdb) {
+                       scsi_pool_free_command(shost->cmd_pool, cmd);
+                       return NULL;
+               }
+       }
+
+       return cmd;
+}
+
 /**
  * __scsi_get_command - Allocate a struct scsi_cmnd
  * @shost: host to transmit command
@@ -223,7 +246,7 @@ struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *shost, gfp_t gfp_mask)
        struct scsi_cmnd *cmd;
        unsigned char *buf;
 
-       cmd = scsi_pool_alloc_command(shost->cmd_pool, gfp_mask);
+       cmd = scsi_host_alloc_command(shost, gfp_mask);
 
        if (unlikely(!cmd)) {
                unsigned long flags;
@@ -466,7 +489,7 @@ int scsi_setup_command_freelist(struct Scsi_Host *shost)
        /*
         * Get one backup command for this host.
         */
-       cmd = scsi_pool_alloc_command(shost->cmd_pool, gfp_mask);
+       cmd = scsi_host_alloc_command(shost, gfp_mask);
        if (!cmd) {
                scsi_put_host_cmd_pool(gfp_mask);
                shost->cmd_pool = NULL;
@@ -709,9 +732,11 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
         * Before we queue this command, check if the command
         * length exceeds what the host adapter can handle.
         */
-       if (CDB_SIZE(cmd) > cmd->device->host->max_cmd_len) {
+       if (cmd->cmd_len > cmd->device->host->max_cmd_len) {
                SCSI_LOG_MLQUEUE(3,
-                               printk("queuecommand : command too long.\n"));
+                       printk("queuecommand : command too long. "
+                              "cdb_size=%d host->max_cmd_len=%d\n",
+                              cmd->cmd_len, cmd->device->host->max_cmd_len));
                cmd->result = (DID_ABORT << 16);
 
                scsi_done(cmd);
@@ -862,9 +887,18 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
 
        good_bytes = scsi_bufflen(cmd);
         if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) {
+               int old_good_bytes = good_bytes;
                drv = scsi_cmd_to_driver(cmd);
                if (drv->done)
                        good_bytes = drv->done(cmd);
+               /*
+                * USB may not give sense identifying bad sector and
+                * simply return a residue instead, so subtract off the
+                * residue if drv->done() error processing indicates no
+                * change to the completion length.
+                */
+               if (good_bytes == old_good_bytes)
+                       good_bytes -= scsi_get_resid(cmd);
        }
        scsi_io_completion(cmd, good_bytes);
 }
@@ -900,11 +934,20 @@ void scsi_adjust_queue_depth(struct scsi_device *sdev, int tagged, int tags)
 
        spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
 
-       /* Check to see if the queue is managed by the block layer.
-        * If it is, and we fail to adjust the depth, exit. */
-       if (blk_queue_tagged(sdev->request_queue) &&
-           blk_queue_resize_tags(sdev->request_queue, tags) != 0)
-               goto out;
+       /*
+        * Check to see if the queue is managed by the block layer.
+        * If it is, and we fail to adjust the depth, exit.
+        *
+        * Do not resize the tag map if it is a host wide share bqt,
+        * because the size should be the hosts's can_queue. If there
+        * is more IO than the LLD's can_queue (so there are not enuogh
+        * tags) request_fn's host queue ready check will handle it.
+        */
+       if (!sdev->host->bqt) {
+               if (blk_queue_tagged(sdev->request_queue) &&
+                   blk_queue_resize_tags(sdev->request_queue, tags) != 0)
+                       goto out;
+       }
 
        sdev->queue_depth = tags;
        switch (tagged) {