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authorEmil Karlson <jekarlson@gmail.com>2018-10-03 21:43:18 +0300
committerBenson Leung <bleung@chromium.org>2018-10-09 20:57:30 -0700
commitd4d2313a3c17eff4aef9a544023c2df5b9f5bedc (patch)
tree18e21d847b5f4c1de71897149fe94b5b7f2cde5c /drivers
parent0238df646e6224016a45505d2c111a24669ebe21 (diff)
mfd: cros-ec: copy the whole event in get_next_event_xfer
Commit 57e94c8b974db2d83c60e1139c89a70806abbea0 caused cros-ec keyboard events be truncated on many chromebooks so that Left and Right keys on Column 12 were always 0. Use ret as memcpy len to fix this. The old code was using ec_dev->event_size, which is the event payload/data size excluding event_type header, for the length of the memcpy operation. Use ret as memcpy length to avoid the off by one and copy the whole msg->data. Fixes: 57e94c8b974d ("mfd: cros-ec: Increase maximum mkbp event size") Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Tested-by: Emil Renner Berthing <kernel@esmil.dk> Signed-off-by: Emil Karlson <jekarlson@gmail.com> Signed-off-by: Benson Leung <bleung@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/platform/chrome/cros_ec_proto.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 398393ab5df8..b6fd4838f60f 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -520,7 +520,7 @@ static int get_next_event_xfer(struct cros_ec_device *ec_dev,
ret = cros_ec_cmd_xfer(ec_dev, msg);
if (ret > 0) {
ec_dev->event_size = ret - 1;
- memcpy(&ec_dev->event_data, msg->data, ec_dev->event_size);
+ memcpy(&ec_dev->event_data, msg->data, ret);
}
return ret;