diff options
| author | Xiaogang Chen <xiaogang.chen@amd.com> | 2026-06-16 17:18:59 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-07-01 12:58:33 -0400 |
| commit | 8cd2ea7bab77b7aa087b1a6cc26d2df03c2a6ed9 (patch) | |
| tree | 8963f2c8f34735de080145276733d244fa5dc77c | |
| parent | 186bfdc4e26d019b2e7570cb121964a1d89b2e5b (diff) | |
drm/amdkfd: Guard m->cp_hqd_eop_control setting by q->eop_ring_buffer_size
To avoid wraparound if the value is 0.
Signed-off-by: Xiaogang Chen <xiaogang.chen@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit c0cae35661868af207077a4306bc42c7c972947c)
Cc: stable@vger.kernel.org
5 files changed, 10 insertions, 10 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c index 8e8ec266ca46..e034da638c07 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c @@ -203,8 +203,8 @@ static void update_mqd(struct mqd_manager *mm, void *mqd, * more than (EOP entry count - 1) so a queue size of 0x800 dwords * is safe, giving a maximum field value of 0xA. */ - m->cp_hqd_eop_control = min(0xA, - ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1); + m->cp_hqd_eop_control = q->eop_ring_buffer_size ? min(0xA, + ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1) : 0; m->cp_hqd_eop_base_addr_lo = lower_32_bits(q->eop_ring_buffer_address >> 8); m->cp_hqd_eop_base_addr_hi = diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c index fff137e00b5e..350fcbbba4b2 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c @@ -241,8 +241,8 @@ static void update_mqd(struct mqd_manager *mm, void *mqd, * more than (EOP entry count - 1) so a queue size of 0x800 dwords * is safe, giving a maximum field value of 0xA. */ - m->cp_hqd_eop_control = min(0xA, - ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1); + m->cp_hqd_eop_control = q->eop_ring_buffer_size ? min(0xA, + ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1) : 0; m->cp_hqd_eop_base_addr_lo = lower_32_bits(q->eop_ring_buffer_address >> 8); m->cp_hqd_eop_base_addr_hi = diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c index 8c815f129614..7c387fa90076 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12.c @@ -216,8 +216,8 @@ static void update_mqd(struct mqd_manager *mm, void *mqd, * more than (EOP entry count - 1) so a queue size of 0x800 dwords * is safe, giving a maximum field value of 0xA. */ - m->cp_hqd_eop_control = min(0xA, - ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1); + m->cp_hqd_eop_control = q->eop_ring_buffer_size ? min(0xA, + ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1) : 0; m->cp_hqd_eop_base_addr_lo = lower_32_bits(q->eop_ring_buffer_address >> 8); m->cp_hqd_eop_base_addr_hi = diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c index 475589b924e9..431a940f91f3 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v12_1.c @@ -294,8 +294,8 @@ static void update_mqd(struct mqd_manager *mm, void *mqd, * more than (EOP entry count - 1) so a queue size of 0x800 dwords * is safe, giving a maximum field value of 0xA. */ - m->cp_hqd_eop_control = min(0xA, - ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1); + m->cp_hqd_eop_control = q->eop_ring_buffer_size ? min(0xA, + ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1) : 0; m->cp_hqd_eop_base_addr_lo = lower_32_bits(q->eop_ring_buffer_address >> 8); m->cp_hqd_eop_base_addr_hi = diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c index c86779af323b..60b87a500698 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c @@ -214,8 +214,8 @@ static void __update_mqd(struct mqd_manager *mm, void *mqd, * more than (EOP entry count - 1) so a queue size of 0x800 dwords * is safe, giving a maximum field value of 0xA. */ - m->cp_hqd_eop_control |= min(0xA, - order_base_2(q->eop_ring_buffer_size / 4) - 1); + m->cp_hqd_eop_control |= q->eop_ring_buffer_size ? min(0xA, + order_base_2(q->eop_ring_buffer_size / 4) - 1) : 0; m->cp_hqd_eop_base_addr_lo = lower_32_bits(q->eop_ring_buffer_address >> 8); m->cp_hqd_eop_base_addr_hi = |