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msm: mhi_dev: Fix interrupt storm during Enable/disable

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mhi_dev_backup_mmio() and mhi_dev_restore_mmio() does backup/restore
of INTR registers of MHI device, causing it to restore interrupts
that are not valid during PCIE PM_RST_DEAST event. The fix is to
skip the INTR register space.

Change-Id: I2a8cde174cf4c6acd7acce13ad0195ed6a9a6f0b
Signed-off-by: Subramanian Ananthanarayanan <skananth@codeaurora.org>
Signed-off-by: Gauri Joshi <gaurjosh@codeaurora.org>
This commit is contained in:
Subramanian Ananthanarayanan 2020-07-07 12:42:04 +05:30 • committed by Gauri Joshi
commit 137bc0157e
2 changed files with 10 additions and 5 deletions
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3
drivers/platform/msm/mhi_dev/mhi.h
View file

@ -412,7 +412,8 @@ static inline void mhi_dev_ring_inc_index(struct mhi_dev_ring *ring,
#define TRACE_DATA_MAX 128
#define MHI_DEV_DATA_MAX 512
#define MHI_DEV_MMIO_RANGE 0xc80
#define MHI_DEV_MMIO_RANGE 0xb80
#define MHI_DEV_MMIO_OFFSET 0x100
struct ring_cache_req {
struct completion *done;

12
drivers/platform/msm/mhi_dev/mhi_mmio.c
View file

@ -598,7 +598,8 @@ int mhi_dev_restore_mmio(struct mhi_dev *dev)
mhi_dev_mmio_mask_interrupts(dev);
for (i = 0; i < (MHI_DEV_MMIO_RANGE/4); i++) {
reg_cntl_addr = dev->mmio_base_addr + (i * 4);
reg_cntl_addr = dev->mmio_base_addr +
MHI_DEV_MMIO_OFFSET + (i * 4);
reg_cntl_value = dev->mmio_backup[i];
writel_relaxed(reg_cntl_value, reg_cntl_addr);
}
@ -619,13 +620,16 @@ EXPORT_SYMBOL(mhi_dev_restore_mmio);
int mhi_dev_backup_mmio(struct mhi_dev *dev)
{
uint32_t i = 0;
void __iomem *reg_cntl_addr;
if (WARN_ON(!dev))
return -EINVAL;
for (i = 0; i < MHI_DEV_MMIO_RANGE/4; i++)
dev->mmio_backup[i] =
readl_relaxed(dev->mmio_base_addr + (i * 4));
for (i = 0; i < MHI_DEV_MMIO_RANGE/4; i++) {
reg_cntl_addr = (void __iomem *) (dev->mmio_base_addr +
MHI_DEV_MMIO_OFFSET + (i * 4));
dev->mmio_backup[i] = readl_relaxed(reg_cntl_addr);
}
return 0;
}