7 files changed, 38 insertions, 17 deletions

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index c7d138eca731..3598110d2cef 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -442,12 +442,15 @@ static int rd_nr;
 int rd_size = CONFIG_BLK_DEV_RAM_SIZE;
 static int max_part;
 static int part_shift;
+static int part_show = 0;
 module_param(rd_nr, int, S_IRUGO);
 MODULE_PARM_DESC(rd_nr, "Maximum number of brd devices");
 module_param(rd_size, int, S_IRUGO);
 MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes.");
 module_param(max_part, int, S_IRUGO);
 MODULE_PARM_DESC(max_part, "Maximum number of partitions per RAM disk");
+module_param(part_show, int, S_IRUGO);
+MODULE_PARM_DESC(part_show, "Control RAM disk visibility in /proc/partitions");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR);
 MODULE_ALIAS("rd");
@@ -501,7 +504,8 @@ static struct brd_device *brd_alloc(int i)
         disk->fops              = &brd_fops;
         disk->private_data      = brd;
         disk->queue             = brd->brd_queue;
-        disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
+        if (!part_show)
+                disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
         sprintf(disk->disk_name, "ram%d", i);
         set_capacity(disk, rd_size * 2);
 
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index db1e9560d8a7..5c8e7fe07745 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3918,7 +3918,6 @@ skip_create_disk:
         if (rv) {
                 dev_err(&dd->pdev->dev,
                         "Unable to allocate request queue\n");
-                rv = -ENOMEM;
                 goto block_queue_alloc_init_error;
         }
 
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index a3b042c4d448..00d469c7f9f7 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -462,17 +462,21 @@ static int null_add_dev(void)
         struct gendisk *disk;
         struct nullb *nullb;
         sector_t size;
+        int rv;
 
         nullb = kzalloc_node(sizeof(*nullb), GFP_KERNEL, home_node);
-        if (!nullb)
+        if (!nullb) {
+                rv = -ENOMEM;
                 goto out;
+        }
 
         spin_lock_init(&nullb->lock);
 
         if (queue_mode == NULL_Q_MQ && use_per_node_hctx)
                 submit_queues = nr_online_nodes;
 
-        if (setup_queues(nullb))
+        rv = setup_queues(nullb);
+        if (rv)
                 goto out_free_nullb;
 
         if (queue_mode == NULL_Q_MQ) {
@@ -484,22 +488,29 @@ static int null_add_dev(void)
                 nullb->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
                 nullb->tag_set.driver_data = nullb;
 
-                if (blk_mq_alloc_tag_set(&nullb->tag_set))
+                rv = blk_mq_alloc_tag_set(&nullb->tag_set);
+                if (rv)
                         goto out_cleanup_queues;
 
                 nullb->q = blk_mq_init_queue(&nullb->tag_set);
-                if (!nullb->q)
+                if (!nullb->q) {
+                        rv = -ENOMEM;
                         goto out_cleanup_tags;
+                }
         } else if (queue_mode == NULL_Q_BIO) {
                 nullb->q = blk_alloc_queue_node(GFP_KERNEL, home_node);
-                if (!nullb->q)
+                if (!nullb->q) {
+                        rv = -ENOMEM;
                         goto out_cleanup_queues;
+                }
                 blk_queue_make_request(nullb->q, null_queue_bio);
                 init_driver_queues(nullb);
         } else {
                 nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock, home_node);
-                if (!nullb->q)
+                if (!nullb->q) {
+                        rv = -ENOMEM;
                         goto out_cleanup_queues;
+                }
                 blk_queue_prep_rq(nullb->q, null_rq_prep_fn);
                 blk_queue_softirq_done(nullb->q, null_softirq_done_fn);
                 init_driver_queues(nullb);
@@ -509,8 +520,10 @@ static int null_add_dev(void)
         queue_flag_set_unlocked(QUEUE_FLAG_NONROT, nullb->q);
 
         disk = nullb->disk = alloc_disk_node(1, home_node);
-        if (!disk)
+        if (!disk) {
+                rv = -ENOMEM;
                 goto out_cleanup_blk_queue;
+        }
 
         mutex_lock(&lock);
         list_add_tail(&nullb->list, &nullb_list);
@@ -544,7 +557,7 @@ out_cleanup_queues:
 out_free_nullb:
         kfree(nullb);
 out:
-        return -ENOMEM;
+        return rv;
 }
 
 static int __init null_init(void)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 623c84145b79..4b97baf8afa3 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5087,9 +5087,11 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
         set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
         set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
 
-        rbd_dev->rq_wq = alloc_workqueue(rbd_dev->disk->disk_name, 0, 0);
-        if (!rbd_dev->rq_wq)
+        rbd_dev->rq_wq = alloc_workqueue("%s", 0, 0, rbd_dev->disk->disk_name);
+        if (!rbd_dev->rq_wq) {
+                ret = -ENOMEM;
                 goto err_out_mapping;
+        }
 
         ret = rbd_bus_add_dev(rbd_dev);
         if (ret)
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index ab3ea62e5dfc..c4328d9d9981 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -1203,7 +1203,6 @@ static struct platform_driver ace_platform_driver = {
         .probe = ace_probe,
         .remove = ace_remove,
         .driver = {
-                .owner = THIS_MODULE,
                 .name = "xsysace",
                 .of_match_table = ace_of_match,
         },
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index dfa4024c448a..d00831c3d731 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -378,7 +378,6 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index)
         /* Should NEVER happen. Return bio error if it does. */
         if (unlikely(ret)) {
                 pr_err("Decompression failed! err=%d, page=%u\n", ret, index);
-                atomic64_inc(&zram->stats.failed_reads);
                 return ret;
         }
 
@@ -547,8 +546,6 @@ out:
                 zcomp_strm_release(zram->comp, zstrm);
         if (is_partial_io(bvec))
                 kfree(uncmem);
-        if (ret)
-                atomic64_inc(&zram->stats.failed_writes);
         return ret;
 }
 
@@ -566,6 +563,13 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
                 ret = zram_bvec_write(zram, bvec, index, offset);
         }
 
+        if (unlikely(ret)) {
+                if (rw == READ)
+                        atomic64_inc(&zram->stats.failed_reads);
+                else
+                        atomic64_inc(&zram->stats.failed_writes);
+        }
+
         return ret;
 }
 
diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index 5b0afde729cd..e0f725c87cc6 100644
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -84,7 +84,7 @@ struct zram_stats {
         atomic64_t compr_data_size;     /* compressed size of pages stored */
         atomic64_t num_reads;   /* failed + successful */
         atomic64_t num_writes;  /* --do-- */
-        atomic64_t failed_reads;        /* should NEVER! happen */
+        atomic64_t failed_reads;        /* can happen when memory is too low */
         atomic64_t failed_writes;       /* can happen when memory is too low */
         atomic64_t invalid_io;  /* non-page-aligned I/O requests */
         atomic64_t notify_free; /* no. of swap slot free notifications */