diff options
| author | Long Li <longli@microsoft.com> | 2025-05-05 17:56:35 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-27 11:11:25 +0100 |
| commit | bf1299797c3c425fd1ce41591f98b752783abe35 (patch) | |
| tree | 4c8803c23a7831842058ae32918ff14689edce84 | |
| parent | 157b0827d7f04fa31adb94eabd516f93b8529a88 (diff) | |
uio_hv_generic: Align ring size to system page
commit 0315fef2aff9f251ddef8a4b53db9187429c3553 upstream.
Following the ring header, the ring data should align to system page
boundary. Adjust the size if necessary.
Cc: stable@vger.kernel.org
Fixes: 95096f2fbd10 ("uio-hv-generic: new userspace i/o driver for VMBus")
Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1746492997-4599-4-git-send-email-longli@linuxonhyperv.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1746492997-4599-4-git-send-email-longli@linuxonhyperv.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/uio/uio_hv_generic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 16391be4e7f2..a6551a795f74 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -243,6 +243,9 @@ hv_uio_probe(struct hv_device *dev, if (!ring_size) ring_size = SZ_2M; + /* Adjust ring size if necessary to have it page aligned */ + ring_size = VMBUS_RING_SIZE(ring_size); + pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; |