diff --git a/block/bsg.c b/block/bsg.c
index 0c8b64a16484721308587c7a6b635344a9144a1e..702f1316bb8fec6d68fcb7e0fc262c960530fc29 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -182,7 +182,7 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
return -ENOMEM;
}
- if (copy_from_user(rq->cmd, (void *)(unsigned long)hdr->request,
+ if (copy_from_user(rq->cmd, (void __user *)(unsigned long)hdr->request,
hdr->request_len))
return -EFAULT;
@@ -249,7 +249,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
struct request *rq, *next_rq = NULL;
int ret, rw;
unsigned int dxfer_len;
- void *dxferp = NULL;
+ void __user *dxferp = NULL;
struct bsg_class_device *bcd = &q->bsg_dev;
/* if the LLD has been removed then the bsg_unregister_queue will
@@ -291,7 +291,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
rq->next_rq = next_rq;
next_rq->cmd_type = rq->cmd_type;
- dxferp = (void*)(unsigned long)hdr->din_xferp;
+ dxferp = (void __user *)(unsigned long)hdr->din_xferp;
ret = blk_rq_map_user(q, next_rq, NULL, dxferp,
hdr->din_xfer_len, GFP_KERNEL);
if (ret)
@@ -300,10 +300,10 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
if (hdr->dout_xfer_len) {
dxfer_len = hdr->dout_xfer_len;
- dxferp = (void*)(unsigned long)hdr->dout_xferp;
+ dxferp = (void __user *)(unsigned long)hdr->dout_xferp;
} else if (hdr->din_xfer_len) {
dxfer_len = hdr->din_xfer_len;
- dxferp = (void*)(unsigned long)hdr->din_xferp;
+ dxferp = (void __user *)(unsigned long)hdr->din_xferp;
} else
dxfer_len = 0;
@@ -445,7 +445,7 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
int len = min_t(unsigned int, hdr->max_response_len,
rq->sense_len);
- ret = copy_to_user((void*)(unsigned long)hdr->response,
+ ret = copy_to_user((void __user *)(unsigned long)hdr->response,
rq->sense, len);
if (!ret)
hdr->response_len = len;
@@ -606,7 +606,7 @@ bsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
ret = __bsg_read(buf, count, bd, NULL, &bytes_read);
*ppos = bytes_read;
- if (!bytes_read || (bytes_read && err_block_err(ret)))
+ if (!bytes_read || err_block_err(ret))
bytes_read = ret;
return bytes_read;
@@ -686,7 +686,7 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
/*
* return bytes written on non-fatal errors
*/
- if (!bytes_written || (bytes_written && err_block_err(ret)))
+ if (!bytes_written || err_block_err(ret))
bytes_written = ret;
dprintk("%s: returning %Zd\n", bd->name, bytes_written);
@@ -878,7 +878,7 @@ static unsigned int bsg_poll(struct file *file, poll_table *wait)
spin_lock_irq(&bd->lock);
if (!list_empty(&bd->done_list))
mask |= POLLIN | POLLRDNORM;
- if (bd->queued_cmds >= bd->max_queue)
+ if (bd->queued_cmds < bd->max_queue)
mask |= POLLOUT;
spin_unlock_irq(&bd->lock);
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 16b4d58d84dd1e690a63b2f91efdce58aafe8d44..c049548e68b7ba39d27cf7b9c216868c8fc2b18e 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -223,7 +223,7 @@ static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
h->ctlr, c->busaddr);
#endif /* CCISS_DEBUG */
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
- readl(h->vaddr + SA5_REQUEST_PORT_OFFSET);
+ readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
h->commands_outstanding++;
if ( h->commands_outstanding > h->max_outstanding)
h->max_outstanding = h->commands_outstanding;
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 5cf2993a8338c9e325fb6126d5a6ec3ca371f6e3..2330a9ad5e9568c2e4e1944e76eca10f7c5cdb53 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -458,7 +458,8 @@ static void end_block_io_op(struct bio *bio, int error)
* (which has the sectors we want, number of them, grant references, etc),
* and transmute it to the block API to hand it over to the proper block disk.
*/
-static int do_block_io_op(struct xen_blkif *blkif)
+static int
+__do_block_io_op(struct xen_blkif *blkif)
{
union blkif_back_rings *blk_rings = &blkif->blk_rings;
struct blkif_request req;
@@ -515,6 +516,23 @@ static int do_block_io_op(struct xen_blkif *blkif)
return more_to_do;
}
+static int
+do_block_io_op(struct xen_blkif *blkif)
+{
+ union blkif_back_rings *blk_rings = &blkif->blk_rings;
+ int more_to_do;
+
+ do {
+ more_to_do = __do_block_io_op(blkif);
+ if (more_to_do)
+ break;
+
+ RING_FINAL_CHECK_FOR_REQUESTS(&blk_rings->common, more_to_do);
+ } while (more_to_do);
+
+ return more_to_do;
+}
+
/*
* Transmutation of the 'struct blkif_request' to a proper 'struct bio'
* and call the 'submit_bio' to pass it to the underlying storage.
@@ -700,7 +718,6 @@ static void make_response(struct xen_blkif *blkif, u64 id,
struct blkif_response resp;
unsigned long flags;
union blkif_back_rings *blk_rings = &blkif->blk_rings;
- int more_to_do = 0;
int notify;
resp.id = id;
@@ -727,22 +744,7 @@ static void make_response(struct xen_blkif *blkif, u64 id,
}
blk_rings->common.rsp_prod_pvt++;
RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&blk_rings->common, notify);
- if (blk_rings->common.rsp_prod_pvt == blk_rings->common.req_cons) {
- /*
- * Tail check for pending requests. Allows frontend to avoid
- * notifications if requests are already in flight (lower
- * overheads and promotes batching).
- */
- RING_FINAL_CHECK_FOR_REQUESTS(&blk_rings->common, more_to_do);
-
- } else if (RING_HAS_UNCONSUMED_REQUESTS(&blk_rings->common)) {
- more_to_do = 1;
- }
-
spin_unlock_irqrestore(&blkif->blk_ring_lock, flags);
-
- if (more_to_do)
- blkif_notify_work(blkif);
if (notify)
notify_remote_via_irq(blkif->irq);
}
@@ -824,3 +826,4 @@ static int __init xen_blkif_init(void)
module_init(xen_blkif_init);
MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("xen-backend:vbd");