Thanks. Please review the attached patches.
Best Regards Rex -----Original Message----- From: Dan Carpenter [mailto:dan.carpen...@oracle.com] Sent: Tuesday, October 11, 2016 3:11 PM To: Zhu, Rex Cc: dri-devel at lists.freedesktop.org Subject: re: drm/amd/powerplay: implement smu7 hwmgr to manager asics with smu ip version 7. Hello Rex Zhu, This is a semi-automatic email about new static checker warnings. The patch 599a7e9fe1b6: "drm/amd/powerplay: implement smu7 hwmgr to manager asics with smu ip version 7." from Sep 9, 2016, leads to the following Smatch complaint: drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/smu7_hwmgr.c:3809 smu7_check_states_equal() warn: variable dereferenced before check 'pstate1' (see line 3805) drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/smu7_hwmgr.c 3804 { 3805 const struct smu7_power_state *psa = cast_const_phw_smu7_power_state(pstate1); ^^^^^^^ 3806 const struct smu7_power_state *psb = cast_const_phw_smu7_power_state(pstate2); ^^^^^^^ New dereferences. 3807 int i; 3808 3809 if (pstate1 == NULL || pstate2 == NULL || equal == NULL) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Checked too late. Just as an aside. People really don't review code in initializers. I've commented on this before, and other people have noted it as well but other people are like "In that case, those people shouldn't be kernel devs!" which is so ignorant. Everyone consistently makes the same mistakes. I've spent so many hours looking at basically this same bug over and over and everyone does it. That's nothing to do with your code, in particular, I just wanted to update you on how my morning has been going. (Pretty well, thanks, although I'm due for a second cup of coffee). 3810 return -EINVAL; 3811 regards, dan carpenter -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-drm-amd-powerplay-add-array-length-check-to-avoid-bu.patch Type: application/octet-stream Size: 1189 bytes Desc: 0001-drm-amd-powerplay-add-array-length-check-to-avoid-bu.patch URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20161011/4cb46a8f/attachment-0002.obj> -------------- next part -------------- A non-text attachment was scrubbed... Name: 0002-drm-amd-powerplay-fix-bug-variable-dereferenced-befo.patch Type: application/octet-stream Size: 1518 bytes Desc: 0002-drm-amd-powerplay-fix-bug-variable-dereferenced-befo.patch URL: <https://lists.freedesktop.org/archives/dri-devel/attachments/20161011/4cb46a8f/attachment-0003.obj>
