From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Tue, 5 May 2015 22:36:54 +0000 (-0400)
Subject: staging: unisys: visorchannel_write(): Use memcpy_toio() directly
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ad44088f08a33894ca9fd65511d05d58434b50f4;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

staging: unisys: visorchannel_write(): Use memcpy_toio() directly

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/unisys/visorbus/visorchannel.c b/drivers/staging/unisys/visorbus/visorchannel.c
index bf2f17ac8e97..bf75aa075b74 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);