drm/i915/gvt: do not check len & max_len for lri (dbafc673) · Commits · 戴 / test

lri ususally of variable len and far exceeding 127 dwords. Fixes: ("drm/i915/gvt: Add valid length check for MI variable commands") Signed-off-by:

drivers/gpu/drm/i915/gvt/cmd_parser.c

+0 −12

Original line number	Diff line number	Diff line
		@@ -968,18 +968,6 @@ static int cmd_handler_lri(struct parser_exec_state *s)
		{
		int i, ret = 0;
		int cmd_len = cmd_length(s);
		u32 valid_len = CMD_LEN(1);

		/*
		* Official intel docs are somewhat sloppy , check the definition of
		* MI_LOAD_REGISTER_IMM.
		*/
		#define MAX_VALID_LEN 127
		if ((cmd_len < valid_len) \|\| (cmd_len > MAX_VALID_LEN)) {
		gvt_err("len is not valid: len=%u valid_len=%u\n",
		cmd_len, valid_len);
		return -EFAULT;
		}

		for (i = 1; i < cmd_len; i += 2) {
		if (IS_BROADWELL(s->engine->i915) && s->engine->id != RCS0) {