shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 11:50:43 +09:00
Code Issues Packages Projects Releases Wiki Activity

mmc: rk_sdmmc: fix SW-IOMMU memory leak

Browse Source 
We could quickly reproduce this bug by decrease IO_TLB_DEFAULT_SIZE
and manually disable mmc DTO interrupt which can make driver fall into
post_tmo all the time.

So, some of these dump for swiotlb we can get here due to no enough
IO_TLB can be used to map page for kernel space:

DMA: Out of SW-IOMMU space for 128 bytes at device ff0f0000.rksdmmc
DMA: Out of SW-IOMMU space for 128 bytes at device ff0f0000.rksdmmc
...
DMA: Out of SW-IOMMU space for 128 bytes at device ff0f0000.rksdmmc
DMA: Out of SW-IOMMU space for 128 bytes at device ff0f0000.rksdmmc

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reported-and-tested-by: Jianhong Chen <chenjh@rock-chips.com>
Cc: Yao Xiao <xy@rock-chips.com>
This commit is contained in:
Shawn Lin
2015-08-12 16:25:27 +08:00
parent 6dbf90de24
commit a433ed2a53
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/mmc/host/rk_sdmmc.c
View File

@@ -1969,20 +1969,21 @@ static void dw_mci_post_tmo(struct mmc_host *mmc)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci *host = slot->host;
struct mmc_data *data;
u32 i, regs, cmd_flags;
u32 sdio_int;
unsigned long timeout = 0;
bool ret_timeout = true, is_retry = false;
u32 opcode, offset;
if (host->cur_slot->mrq->data)
dw_mci_stop_dma(host);
offset = host->cru_reset_offset;
opcode = host->mrq->cmd->opcode;
host->cur_slot->mrq = NULL;
host->mrq = NULL;
host->state = STATE_IDLE;
data = host->data;
host->data = NULL;
if ((opcode == MMC_SEND_TUNING_BLOCK_HS200) ||
(opcode == MMC_SEND_TUNING_BLOCK))