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-rw-r--r--drivers/mmc/host/mmci.c8
-rw-r--r--drivers/mmc/host/mmci.h3
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 66aa59f54cd9..760759919f7f 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1123,8 +1123,12 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
* can be as much as a FIFO-worth of data ahead. This
* matters for FIFO overruns only.
*/
- remain = readl(host->base + MMCIDATACNT);
- success = data->blksz * data->blocks - remain;
+ if (!host->variant->datacnt_useless) {
+ remain = readl(host->base + MMCIDATACNT);
+ success = data->blksz * data->blocks - remain;
+ } else {
+ success = 0;
+ }
dev_dbg(mmc_dev(host->mmc), "MCI ERROR IRQ, status 0x%08x at 0x%08x\n",
status_err, success);
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index eef7dd5be01d..cdcadd29a10d 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -224,6 +224,8 @@ struct mmci_host;
* @datactrl_blksz: block size in power of two
* @datactrl_dpsm_enable: enable value for DPSM
* @datactrl_first: true if data must be setup before send command
+ * @datacnt_useless: true if you could not use datacnt register to read
+ * remaining data
* @pwrreg_powerup: power up value for MMCIPOWER register
* @f_max: maximum clk frequency supported by the controller.
* @signal_direction: input/out direction of bus signals can be indicated
@@ -264,6 +266,7 @@ struct variant_data {
unsigned int datactrl_blocksz;
unsigned int datactrl_dpsm_enable;
u8 datactrl_first:1;
+ u8 datacnt_useless:1;
u8 st_sdio:1;
u8 st_clkdiv:1;
u8 blksz_datactrl16:1;
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