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misc: mic: Suppress memory space sparse warnings

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MIC card and host drivers are able to use virtio over the PCIe bus by
treating ioremap return values for the prefetchable BARs as pointers,
effectively treating I/O memory the same as system memory. However this
results in sparse warnings. Knowing that these warnings do not point to
a functional issue, this patch suppresses these warnings.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashutosh Dixit 2013-11-27 08:58:43 -08:00 committed by Greg Kroah-Hartman
parent 173c072787
commit 1a92862369
2 changed files with 9 additions and 7 deletions
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8
drivers/misc/mic/card/mic_virtio.c
View File

@ -256,8 +256,9 @@ static struct virtqueue *mic_find_vq(struct virtio_device *vdev,
mvdev->vr[index] = va;
memset_io(va, 0x0, _vr_size);
vq = vring_new_virtqueue(index, le16_to_cpu(config.num),
MIC_VIRTIO_RING_ALIGN, vdev, false, va,
mic_notify, callback, name);
MIC_VIRTIO_RING_ALIGN, vdev, false,
(void __force *)va, mic_notify, callback,
name);
if (!vq) {
err = -ENOMEM;
goto unmap;
@ -540,7 +541,8 @@ static void mic_scan_devices(struct mic_driver *mdrv, bool remove)
continue;
/* device already exists */
dev = device_find_child(mdrv->dev, d, mic_match_desc);
dev = device_find_child(mdrv->dev, (void __force *)d,
mic_match_desc);
if (dev) {
if (remove)
iowrite8(MIC_VIRTIO_PARAM_DEV_REMOVE,

8
drivers/misc/mic/host/mic_virtio.c
View File

@ -41,7 +41,7 @@ static int mic_virtio_copy_to_user(struct mic_vdev *mvdev,
* We are copying from IO below an should ideally use something
* like copy_to_user_fromio(..) if it existed.
*/
if (copy_to_user(ubuf, dbuf, len)) {
if (copy_to_user(ubuf, (void __force *)dbuf, len)) {
err = -EFAULT;
dev_err(mic_dev(mvdev), "%s %d err %d\n",
__func__, __LINE__, err);
@ -66,7 +66,7 @@ static int mic_virtio_copy_from_user(struct mic_vdev *mvdev,
* We are copying to IO below and should ideally use something
* like copy_from_user_toio(..) if it existed.
*/
if (copy_from_user(dbuf, ubuf, len)) {
if (copy_from_user((void __force *)dbuf, ubuf, len)) {
err = -EFAULT;
dev_err(mic_dev(mvdev), "%s %d err %d\n",
__func__, __LINE__, err);
@ -293,8 +293,8 @@ static void mic_virtio_init_post(struct mic_vdev *mvdev)
continue;
}
mvdev->mvr[i].vrh.vring.used =
mvdev->mdev->aper.va
+ le64_to_cpu(vqconfig[i].used_address);
(void __force *)mvdev->mdev->aper.va +
le64_to_cpu(vqconfig[i].used_address);
}
mvdev->dc->used_address_updated = 0;