From: Dmitry Tarnyagin <[email protected]>
Earlier code was expecting that mmci_pio_write() returns
not more than 'remain' bytes transferred. It is not the case
for buffers which are not multiple of 4 bytes length.
The patch fix the problem by checking result of mmci_pio_write().
The fault was introduced in the change:
I2e506ec1f5a7fadf9780c18d8d31573eaf048273
MMCI: Fixup sg buffer handling in pio_write
Signed-off-by: Dmitry Tarnyagin <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
---
drivers/mmc/host/mmci.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 6e27433..e238462 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -753,7 +753,10 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
if (status & MCI_TXACTIVE)
len = mmci_pio_write(host, buffer, remain, status);
- sg_miter->consumed = len;
+ if (len > sg_miter->consumed)
+ len = sg_miter->consumed;
+ else
+ sg_miter->consumed = len;
host->size -= len;
remain -= len;
--
1.7.3.2
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