The current code checks for both DATA_END and DATA_BLK_END bits in
MCI_STATUS register and ends a request only if both are set at a time.
The hardware doesn't always set DATA_BLK_END when DATA_END is set.
But DATA_END status itself is sufficient condition from hardware that
data transfer is done and hence, check for only DATA_END interrupt in
software to end a request.
Signed-off-by: Sahitya Tummala <stummala@xxxxxxxxxxxxxx>
---
drivers/mmc/host/msm_sdcc.c | 15 ++++-----------
drivers/mmc/host/msm_sdcc.h | 1 -
2 files changed, 4 insertions(+), 12 deletions(-)
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 355d799..23b6f57 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -190,7 +190,7 @@ static void
msmsdcc_stop_data(struct msmsdcc_host *host)
{
host->curr.data = NULL;
- host->curr.got_dataend = host->curr.got_datablkend = 0;
+ host->curr.got_dataend = 0;
}
uint32_t msmsdcc_fifo_addr(struct msmsdcc_host *host)
@@ -277,8 +277,7 @@ msmsdcc_dma_complete_tlet(unsigned long data)
host->dma.sg = NULL;
host->dma.busy = 0;
- if ((host->curr.got_dataend && host->curr.got_datablkend)
- || mrq->data->error) {
+ if (host->curr.got_dataend || mrq->data->error) {
/*
* If we've already gotten our DATAEND / DATABLKEND
@@ -506,7 +505,6 @@ msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data,
host->curr.xfer_remain = host->curr.xfer_size;
host->curr.data_xfered = 0;
host->curr.got_dataend = 0;
- host->curr.got_datablkend = 0;
memset(&host->pio, 0, sizeof(host->pio));
@@ -827,14 +825,10 @@ msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status,
if (!host->curr.got_dataend && (status & MCI_DATAEND))
host->curr.got_dataend = 1;
- if (!host->curr.got_datablkend && (status & MCI_DATABLOCKEND))
- host->curr.got_datablkend = 1;
-
/*
* If DMA is still in progress, we complete via the completion handler
*/
- if (host->curr.got_dataend && host->curr.got_datablkend &&
- !host->dma.busy) {
+ if (host->curr.got_dataend && !host->dma.busy) {
/*
* There appears to be an issue in the controller where
* if you request a small block transfer (< fifo size),
@@ -871,8 +865,7 @@ msmsdcc_irq(int irq, void *dev_id)
do {
status = msmsdcc_readl(host, MMCISTATUS);
- status &= (msmsdcc_readl(host, MMCIMASK0) |
- MCI_DATABLOCKENDMASK);
+ status &= msmsdcc_readl(host, MMCIMASK0);
msmsdcc_writel(host, status, MMCICLEAR);
if (status & MCI_SDIOINTR)
diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h
index ac79ed9..9a14144 100644
--- a/drivers/mmc/host/msm_sdcc.h
+++ b/drivers/mmc/host/msm_sdcc.h
@@ -190,7 +190,6 @@ struct msmsdcc_curr_req {
unsigned int xfer_remain; /* Bytes remaining to send */
unsigned int data_xfered; /* Bytes acked by BLKEND irq */
int got_dataend;
- int got_datablkend;
int user_pages;
};
--
1.7.1
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
