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mmc: mtk-sd: fix hang when data read quickly

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For CMD21 tuning data, the 128/64 bytes data may coming in very
short time, before msdc_start_data(), the read data has already
come, in this case, clear MSDC_INT will cause the interrupt disappear
and lead to the thread hang.

the solution is just clear all interrupts before command was sent.

Signed-off-by: mingming lee <mingming.lee@mediatek.com>
This commit is contained in:
mingming lee 2019-12-31 11:29:25 +08:00 committed by Tom Rini
parent 3b0397d48b
commit fb80eaa9d8
1 changed files with 1 additions and 5 deletions
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6
drivers/mmc/mtk-sd.c
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@ -14,7 +14,6 @@
#include <malloc.h>
#include <mapmem.h>
#include <stdbool.h>
#include <watchdog.h>
#include <asm/gpio.h>
#include <dm/pinctrl.h>
#include <linux/bitops.h>
@ -531,6 +530,7 @@ static int msdc_start_command(struct msdc_host *host, struct mmc_cmd *cmd,
blocks = data->blocks;
writel(CMD_INTS_MASK, &host->base->msdc_int);
writel(DATA_INTS_MASK, &host->base->msdc_int);
writel(blocks, &host->base->sdc_blk_num);
writel(cmd->cmdarg, &host->base->sdc_arg);
writel(rawcmd, &host->base->sdc_cmd);
@ -677,13 +677,9 @@ static int msdc_start_data(struct msdc_host *host, struct mmc_data *data)
u32 size;
int ret;
WATCHDOG_RESET();
if (data->flags == MMC_DATA_WRITE)
host->last_data_write = 1;
writel(DATA_INTS_MASK, &host->base->msdc_int);
size = data->blocks * data->blocksize;
if (data->flags == MMC_DATA_WRITE)