diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwtracing/intel_th/msu.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c index b200d9d1c7a0..fc9f15f36ad4 100644 --- a/drivers/hwtracing/intel_th/msu.c +++ b/drivers/hwtracing/intel_th/msu.c @@ -143,6 +143,8 @@ struct msc { unsigned int single_wrap : 1; void *base; dma_addr_t base_addr; + u32 orig_addr; + u32 orig_sz; /* <0: no buffer, 0: no users, >0: active users */ atomic_t user_count; @@ -767,6 +769,9 @@ static int msc_configure(struct msc *msc) msc_buffer_clear_hw_header(msc); } + msc->orig_addr = ioread32(msc->reg_base + REG_MSU_MSC0BAR); + msc->orig_sz = ioread32(msc->reg_base + REG_MSU_MSC0SIZE); + reg = msc->base_addr >> PAGE_SHIFT; iowrite32(reg, msc->reg_base + REG_MSU_MSC0BAR); @@ -841,8 +846,8 @@ static void msc_disable(struct msc *msc) msc->enabled = 0; - iowrite32(0, msc->reg_base + REG_MSU_MSC0BAR); - iowrite32(0, msc->reg_base + REG_MSU_MSC0SIZE); + iowrite32(msc->orig_addr, msc->reg_base + REG_MSU_MSC0BAR); + iowrite32(msc->orig_sz, msc->reg_base + REG_MSU_MSC0SIZE); dev_dbg(msc_dev(msc), "MSCnNWSA: %08x\n", ioread32(msc->reg_base + REG_MSU_MSC0NWSA)); |