From afd9970f957454782795b23c89fd6d7dde973cc0 Mon Sep 17 00:00:00 2001 From: Michael Albaugh Date: Wed, 16 Apr 2008 21:09:28 -0700 Subject: [PATCH] IB/ipath: Allow old and new diagnostic packet formats This patch checks for old and new format writes to send a packet via the diagnostic interface. Signed-off-by: Michael Albaugh Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_diag.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c index af59bf380c..c9bfd827e7 100644 --- a/drivers/infiniband/hw/ipath/ipath_diag.c +++ b/drivers/infiniband/hw/ipath/ipath_diag.c @@ -332,12 +332,17 @@ static ssize_t ipath_diagpkt_write(struct file *fp, u64 val; u32 l_state, lt_state; /* LinkState, LinkTrainingState */ - if (count != sizeof(dp)) { + if (count < sizeof(odp)) { ret = -EINVAL; goto bail; } - if (copy_from_user(&dp, data, sizeof(dp))) { + if (count == sizeof(dp)) { + if (copy_from_user(&dp, data, sizeof(dp))) { + ret = -EFAULT; + goto bail; + } + } else if (copy_from_user(&odp, data, sizeof(odp))) { ret = -EFAULT; goto bail; } -- 2.39.5