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authorMarkos Chandras <markos.chandras@imgtec.com>2013-03-22 20:50:05 +0400
committerChris Ball <cjb@laptop.org>2013-03-22 20:50:05 +0400
commit3e4b0d8bdc6ddd68fdc1f4592822af2ae5cc2859 (patch)
tree2a6b44f788d9bcaa235a11db0332e9e263c049cc /drivers/mmc
parent1fb5f68addde6d8b79dd7d747814aa1770e6cf21 (diff)
downloadlinux-3e4b0d8bdc6ddd68fdc1f4592822af2ae5cc2859.tar.xz
mmc: dw_mmc: Avoid adding the number of transmitted bytes twice
Previously, it was possible to add either 0 bytes or add nbytes twice if we broke out of the outer loop and then carry on to the "done" label. This is now fixed by adding the transferred bytes right after the pull/pop operation Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Acked-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/dw_mmc.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index e7be4023382c..a23b262f9cdd 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1454,7 +1454,7 @@ static void dw_mci_read_data_pio(struct dw_mci *host, bool dto)
struct mmc_data *data = host->data;
int shift = host->data_shift;
u32 status;
- unsigned int nbytes = 0, len;
+ unsigned int len;
unsigned int remain, fcnt;
do {
@@ -1473,8 +1473,8 @@ static void dw_mci_read_data_pio(struct dw_mci *host, bool dto)
if (!len)
break;
dw_mci_pull_data(host, (void *)(buf + offset), len);
+ data->bytes_xfered += len;
offset += len;
- nbytes += len;
remain -= len;
} while (remain);
@@ -1484,7 +1484,6 @@ static void dw_mci_read_data_pio(struct dw_mci *host, bool dto)
/* if the RXDR is ready read again */
} while ((status & SDMMC_INT_RXDR) ||
(dto && SDMMC_GET_FCNT(mci_readl(host, STATUS))));
- data->bytes_xfered += nbytes;
if (!remain) {
if (!sg_miter_next(sg_miter))
@@ -1495,7 +1494,6 @@ static void dw_mci_read_data_pio(struct dw_mci *host, bool dto)
return;
done:
- data->bytes_xfered += nbytes;
sg_miter_stop(sg_miter);
host->sg = NULL;
smp_wmb();
@@ -1510,7 +1508,7 @@ static void dw_mci_write_data_pio(struct dw_mci *host)
struct mmc_data *data = host->data;
int shift = host->data_shift;
u32 status;
- unsigned int nbytes = 0, len;
+ unsigned int len;
unsigned int fifo_depth = host->fifo_depth;
unsigned int remain, fcnt;
@@ -1531,8 +1529,8 @@ static void dw_mci_write_data_pio(struct dw_mci *host)
if (!len)
break;
host->push_data(host, (void *)(buf + offset), len);
+ data->bytes_xfered += len;
offset += len;
- nbytes += len;
remain -= len;
} while (remain);
@@ -1540,7 +1538,6 @@ static void dw_mci_write_data_pio(struct dw_mci *host)
status = mci_readl(host, MINTSTS);
mci_writel(host, RINTSTS, SDMMC_INT_TXDR);
} while (status & SDMMC_INT_TXDR); /* if TXDR write again */
- data->bytes_xfered += nbytes;
if (!remain) {
if (!sg_miter_next(sg_miter))
@@ -1551,7 +1548,6 @@ static void dw_mci_write_data_pio(struct dw_mci *host)
return;
done:
- data->bytes_xfered += nbytes;
sg_miter_stop(sg_miter);
host->sg = NULL;
smp_wmb();