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| author | Preetham Chandru Ramchandra <pchandru@nvidia.com> | 2018-08-13 05:37:26 -0400 |
|---|---|---|
| committer | mobile promotions <svcmobile_promotions@nvidia.com> | 2018-08-14 05:00:02 -0400 |
| commit | 7306f2b13106a2464fcc83493554368d31ba2d44 (patch) | |
| tree | b91d40cc522b1679151dda5f0f988a4fd80abf96 /drivers/gpu/nvgpu/pmgr/pwrpolicy.c | |
| parent | 2328d305b7c9437aa467922086b9fcfc0a4169ba (diff) | |
gpu: nvpgu: unpowergate GPU in ioctl_tsg_open()
The nvgpu_ioctl_tsg_open() does not make sure that GPU is
unpowergated. Due to this it leads to kernel
panic when GPU registers are accessed when powergated.
__gk20a_warn_on_no_regs+0x38/0x58 [nvgpu]
__nvgpu_readl+0x74/0xc8 [nvgpu]
nvgpu_readl+0x28/0x60 [nvgpu]
xxxxx_ce_get_num_pce+0x28/0x70 [nvgpu]
xxxxx_fifo_init_eng_method_buffers+0x64/0x1c0 [nvgpu]
gk20a_tsg_open+0x110/0x1e0 [nvgpu]
nvgpu_ioctl_tsg_open+0x88/0x100 [nvgpu]
gk20a_ctrl_dev_ioctl+0x734/0x2388 [nvgpu]
do_vfs_ioctl+0xc4/0x918
SyS_ioctl+0x94/0xa8
This change fixes this issue by calling gk20a_busy()/gk20a_idle()
in nvgpu_ioctl_tsg_open()
Bug 2268533
JIRA NVGPU-1016
Change-Id: I578289e7eb60295d6b6169b754a5cc60f7546fd5
Signed-off-by: Preetham Chandru Ramchandra <pchandru@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1794324
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/pmgr/pwrpolicy.c')
0 files changed, 0 insertions, 0 deletions