]> err.no Git - linux-2.6/blobdiff - drivers/scsi/scsi.c
binfmt_misc: fix false -ENOEXEC when coupled with other binary handlers
[linux-2.6] / drivers / scsi / scsi.c
index 5276e73c58fc736175be79891a37de919b60b8a7..ee6be596503d1515dc855e6e5715267ac4edb4e1 100644 (file)
@@ -197,10 +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
@@ -214,7 +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;
@@ -457,7 +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;