From: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
Signed-off-by: Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>
Signed-off-by: Benjamin Romer <benjamin.romer@xxxxxxxxxx>
---
drivers/staging/unisys/visorbus/visorchannel.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/unisys/visorbus/visorchannel.c b/drivers/staging/unisys/visorbus/visorchannel.c
index bf2f17a..bf75aa0 100644
--- a/drivers/staging/unisys/visorbus/visorchannel.c
+++ b/drivers/staging/unisys/visorbus/visorchannel.c
@@ -216,10 +216,15 @@ visorchannel_write(struct visorchannel *channel, ulong offset,
{
size_t size = sizeof(struct channel_header);
+ if (offset + nbytes > channel->memregion.nbytes)
+ return -EIO;
+
if (!offset && nbytes >= size)
memcpy(&channel->chan_hdr, local, size);
- return visor_memregion_write(&channel->memregion,
- offset, local, nbytes);
+
+ memcpy_toio(channel->memregion.mapped + offset, local, nbytes);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(visorchannel_write);
--
2.1.4
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