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| author | Zhao Yan <yan.y.zhao@intel.com> | 2018-05-08 09:52:42 +0300 |
|---|---|---|
| committer | Zhi Wang <zhi.a.wang@intel.com> | 2018-05-14 00:18:55 +0300 |
| commit | 0438a1059877396319b90da289f1473c9c973cd8 (patch) | |
| tree | 84c68706670078b62f18066ffd78bd798a57b5a3 /drivers/gpu/drm/i915/gvt/cmd_parser.c | |
| parent | 3d8b9e258b9dbbeb0cdeb1cf5885e40d63d564ab (diff) | |
| download | linux-0438a1059877396319b90da289f1473c9c973cd8.tar.xz | |
drm/i915/gvt: do not return error on handling force_to_nonpriv registers
Return error will cause vm hang and enter failsafe mode.
However, we don't want that happen on detecting an wrong force_to_nonpriv
register write.
Therefore, we just omit the wrong write or patch it to default value.
v2: only return 0 on detecting lri write of registers outside whitelist,
but still return error on other error conditions. (zhenyu wang)
Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Reviewed-by: Zhang Yulei <yulei.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/cmd_parser.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/cmd_parser.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index 737cc824344d..536cb691a543 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -828,7 +828,8 @@ static int force_nonpriv_reg_handler(struct parser_exec_state *s, data != nopid) { gvt_err("Unexpected forcenonpriv 0x%x LRI write, value=0x%x\n", offset, data); - return -EPERM; + patch_value(s, cmd_ptr(s, index), nopid); + return 0; } return 0; } |