[PATCH] staging: unisys: fix IO memory copy in channel.h

Benjamin Romer benjamin.romer at unisys.com
Mon Sep 22 17:45:03 UTC 2014


The function ULTRA_check_channel_client() was recently patched to use
ioread8_rep(). Unfortunately the parameters were incorrectly ordered, and this
causes the function to fail and the guest to not boot.

This patch switches the parameters around and uses memcpy_fromio() instead,
which is clearer since a structure is being copied, not an array, and it
fixes the error message printout later in the function that was using the UUID
value in the channel, rather than the value copied from the channel, which
causes a misleading error to be reported.

Signed-off-by: Benjamin Romer <benjamin.romer at unisys.com>
---
 drivers/staging/unisys/common-spar/include/channels/channel.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/unisys/common-spar/include/channels/channel.h b/drivers/staging/unisys/common-spar/include/channels/channel.h
index 5ba5e56..4af9457 100644
--- a/drivers/staging/unisys/common-spar/include/channels/channel.h
+++ b/drivers/staging/unisys/common-spar/include/channels/channel.h
@@ -350,14 +350,14 @@ ULTRA_check_channel_client(void __iomem *pChannel,
 	if (uuid_le_cmp(expectedTypeGuid, NULL_UUID_LE) != 0) {
 		uuid_le guid;
 
-		ioread8_rep(&((CHANNEL_HEADER __iomem *)(pChannel))->Type,
-			&guid, sizeof(guid));
+		memcpy_fromio(&guid,
+			      &((CHANNEL_HEADER __iomem *)(pChannel))->Type,
+			      sizeof(guid));
 		/* caller wants us to verify type GUID */
 		if (uuid_le_cmp(guid, expectedTypeGuid) != 0) {
 			CHANNEL_GUID_MISMATCH(expectedTypeGuid, channelName,
 					      "type", expectedTypeGuid,
-					      ((CHANNEL_HEADER __iomem *)
-					       (pChannel))->Type, fileName,
+					      guid, fileName,
 					      lineNumber, logCtx);
 			return 0;
 		}
-- 
1.9.1



More information about the devel mailing list