The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b398d53cd421454d64850f8b1f6d609ede9042d9 Mon Sep 17 00:00:00 2001
From: Alexander Usyskin alexander.usyskin@intel.com Date: Mon, 8 Feb 2021 17:06:48 +0200 Subject: [PATCH] mei: bus: block send with vtag on non-conformat FW
Block data send with vtag if either transport layer or FW client are not supporting vtags.
Cc: stable@vger.kernel.org # v5.10+ Signed-off-by: Alexander Usyskin alexander.usyskin@intel.com Signed-off-by: Tomas Winkler tomas.winkler@intel.com Link: https://lore.kernel.org/r/20210208150649.141358-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 580074e32599..935acc6bbf3c 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -61,6 +61,13 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, u8 vtag, goto out; }
+ if (vtag) { + /* Check if vtag is supported by client */ + rets = mei_cl_vt_support_check(cl); + if (rets) + goto out; + } + if (length > mei_cl_mtu(cl)) { rets = -EFBIG; goto out;