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accel/ivpu: Do not use mutex_lock_interruptible

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If we get signal when waiting for the mmu->lock we do not invalidate
current MMU configuration that might result in undefined behavior.

Additionally there is little or no benefit on break waiting for
ipc->lock. In current code base, we keep this lock for short periods.

Fixes: 263b2ba5fc ("accel/ivpu: Add Intel VPU MMU support")
Reviewed-by: Krystian Pradzynski <krystian.pradzynski@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230525103818.877590-2-stanislaw.gruszka@linux.intel.com
This commit is contained in:
Stanislaw Gruszka 2023-05-25 12:38:18 +02:00
parent 9f7e3611f6
commit b563e47957
2 changed files with 7 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/accel/ivpu/ivpu_ipc.c
View file

@ -183,9 +183,7 @@ ivpu_ipc_send(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, struct v
struct ivpu_ipc_info *ipc = vdev->ipc;
int ret;
ret = mutex_lock_interruptible(&ipc->lock);
if (ret)
return ret;
mutex_lock(&ipc->lock);
if (!ipc->on) {
ret = -EAGAIN;

22
drivers/accel/ivpu/ivpu_mmu.c
View file

@ -587,16 +587,11 @@ static int ivpu_mmu_strtab_init(struct ivpu_device *vdev)
int ivpu_mmu_invalidate_tlb(struct ivpu_device *vdev, u16 ssid)
{
struct ivpu_mmu_info *mmu = vdev->mmu;
int ret;
int ret = 0;
ret = mutex_lock_interruptible(&mmu->lock);
if (ret)
return ret;
if (!mmu->on) {
ret = 0;
mutex_lock(&mmu->lock);
if (!mmu->on)
goto unlock;
}
ret = ivpu_mmu_cmdq_write_tlbi_nh_asid(vdev, ssid);
if (ret)
@ -614,7 +609,7 @@ static int ivpu_mmu_cd_add(struct ivpu_device *vdev, u32 ssid, u64 cd_dma)
struct ivpu_mmu_cdtab *cdtab = &mmu->cdtab;
u64 *entry;
u64 cd[4];
int ret;
int ret = 0;
if (ssid > IVPU_MMU_CDTAB_ENT_COUNT)
return -EINVAL;
@ -655,14 +650,9 @@ static int ivpu_mmu_cd_add(struct ivpu_device *vdev, u32 ssid, u64 cd_dma)
ivpu_dbg(vdev, MMU, "CDTAB %s entry (SSID=%u, dma=%pad): 0x%llx, 0x%llx, 0x%llx, 0x%llx\n",
cd_dma ? "write" : "clear", ssid, &cd_dma, cd[0], cd[1], cd[2], cd[3]);
ret = mutex_lock_interruptible(&mmu->lock);
if (ret)
return ret;
if (!mmu->on) {
ret = 0;
mutex_lock(&mmu->lock);
if (!mmu->on)
goto unlock;
}
ret = ivpu_mmu_cmdq_write_cfgi_all(vdev);
if (ret)