ioat2: clarify ring size limits

With the addition of ioat_max_alloc_order it is not clear what the
maximum allocation order is, so document that in the modinfo.  Also take
an opportunity to kill a stray semicolon.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 5d6ac49e0d32..8fd0b59f1902 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -42,18 +42,19 @@
 int ioat_ring_alloc_order = 8;
 module_param(ioat_ring_alloc_order, int, 0644);
 MODULE_PARM_DESC(ioat_ring_alloc_order,
-                 "ioat2+: allocate 2^n descriptors per channel (default: n=8)");
+                 "ioat2+: allocate 2^n descriptors per channel"
+                 " (default: 8 max: 16)");
 static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER;
 module_param(ioat_ring_max_alloc_order, int, 0644);
 MODULE_PARM_DESC(ioat_ring_max_alloc_order,
-                 "ioat2+: upper limit for dynamic ring resizing (default: n=16)");
+                 "ioat2+: upper limit for ring size (default: 16)");
 
 void __ioat2_issue_pending(struct ioat2_dma_chan *ioat)
 {
         void * __iomem reg_base = ioat->base.reg_base;
 
         ioat->pending = 0;
-        ioat->dmacount += ioat2_ring_pending(ioat);;
+        ioat->dmacount += ioat2_ring_pending(ioat);
         ioat->issued = ioat->head;
         /* make descriptor updates globally visible before notifying channel */
         wmb();