mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-24 10:34:43 +03:00
eb473aa0b1
If gk20a_comptaglines_alloc() is called with an uninitialized comptag allocator we right now see a kernel panic like this [ 445.097931] [<ffffff8008fdd650>] __mutex_lock_slowpath+0xe0/0x188 [ 445.104275] [<ffffff8008fdd748>] mutex_lock+0x50/0x68 [ 445.109773] [<ffffff80012ef340>] gk20a_comptaglines_alloc+0x30/0x98 [nvgpu] [ 445.117169] [<ffffff80012e0fdc>] gk20a_alloc_or_get_comptags+0xe4/0x140 [nvgpu] [ 445.124910] [<ffffff80012ee1cc>] nvgpu_vm_map+0x414/0x7b8 [nvgpu] [ 445.131433] [<ffffff80012dd754>] nvgpu_vm_map_linux+0x114/0x1e8 [nvgpu] [ 445.138475] [<ffffff80012dd978>] nvgpu_vm_map_buffer+0x150/0x238 [nvgpu] [ 445.145605] [<ffffff80012d2834>] gk20a_as_dev_ioctl+0x30c/0xa78 [nvgpu] [ 445.152473] [<ffffff8008262154>] do_vfs_ioctl+0xc4/0x8f8 Fix this by checking explicitly that comptag allocator is initialized in gk20a_comptaglines_alloc() and gk20a_comptaglines_free() Bug 2171567 Change-Id: Iaac6d77e40a8aaa01f2bacbe0cb54ec447100075 Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1805170 GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>