---

yaml --- r: 165770 b: refs/heads/master c: bb32078 h: refs/heads/master v: v3
git-mirror · Sep 9, 2009 · 25e1d8e · 25e1d8e
1 parent c027f87
commit 25e1d8e
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Showing 3 changed files with 15 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4fb9b9e8d55880523db550043dfb204696dd0422
+refs/heads/master: bb3207863014c7310593146f11fbc6573eab43c8
diff --git a/trunk/drivers/dma/ioat/dma.c b/trunk/drivers/dma/ioat/dma.c
@@ -132,7 +132,14 @@ static int ioat1_enumerate_channels(struct ioatdma_device *device)
 
 	INIT_LIST_HEAD(&dma->channels);
 	dma->chancnt = readb(device->reg_base + IOAT_CHANCNT_OFFSET);
+	dma->chancnt &= 0x1f; /* bits [4:0] valid */
+	if (dma->chancnt > ARRAY_SIZE(device->idx)) {
+		dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
+			 dma->chancnt, ARRAY_SIZE(device->idx));
+		dma->chancnt = ARRAY_SIZE(device->idx);
+	}
 	xfercap_scale = readb(device->reg_base + IOAT_XFERCAP_OFFSET);
+	xfercap_scale &= 0x1f; /* bits [4:0] valid */
 	xfercap = (xfercap_scale == 0 ? -1 : (1UL << xfercap_scale));
 	dev_dbg(dev, "%s: xfercap = %d\n", __func__, xfercap);
 

diff --git a/trunk/drivers/dma/ioat/dma_v2.c b/trunk/drivers/dma/ioat/dma_v2.c
@@ -359,7 +359,14 @@ static int ioat2_enumerate_channels(struct ioatdma_device *device)
 
 	INIT_LIST_HEAD(&dma->channels);
 	dma->chancnt = readb(device->reg_base + IOAT_CHANCNT_OFFSET);
+	dma->chancnt &= 0x1f; /* bits [4:0] valid */
+	if (dma->chancnt > ARRAY_SIZE(device->idx)) {
+		dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
+			 dma->chancnt, ARRAY_SIZE(device->idx));
+		dma->chancnt = ARRAY_SIZE(device->idx);
+	}
 	xfercap_log = readb(device->reg_base + IOAT_XFERCAP_OFFSET);
+	xfercap_log &= 0x1f; /* bits [4:0] valid */
 	if (xfercap_log == 0)
 		return 0;
 	dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);