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drm/i915/gvt: do not check len & max_len for lri

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lri ususally of variable len and far exceeding 127 dwords.

Fixes: 00a33be406 ("drm/i915/gvt: Add valid length check for MI variable commands")
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200304095121.21609-1-yan.y.zhao@intel.com
This commit is contained in:
Yan Zhao 2020-03-18 13:48:26 +08:00 committed by Zhenyu Wang
parent 2484b17242
commit dbafc67307
1 changed files with 0 additions and 12 deletions
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12
drivers/gpu/drm/i915/gvt/cmd_parser.c
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@ -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) {