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i2c: sh_mobile: fix leak when using DMA bounce buffer 

We only freed the bounce buffer after successful DMA, missing the cases
where DMA setup may have gone wrong. Use a better location which always
gets called after each message and use 'stop_after_dma' as a flag for a
successful transfer.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2018-08-24 16:52:46 +02:00 committed by Wolfram Sang
parent 531db50170
commit cebc07d84a
1 changed files with 4 additions and 2 deletions
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6
drivers/i2c/busses/i2c-sh_mobile.c
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@ -507,8 +507,6 @@ static void sh_mobile_i2c_dma_callback(void *data)
pd->pos = pd->msg->len;
pd->stop_after_dma = true;
i2c_put_dma_safe_msg_buf(pd->dma_buf, pd->msg, true);
iic_set_clr(pd, ICIC, 0, ICIC_TDMAE | ICIC_RDMAE);
}
@ -706,6 +704,10 @@ static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter,
timeout = wait_event_timeout(pd->wait,
pd->sr & (ICSR_TACK | SW_DONE),
adapter->timeout);
/* 'stop_after_dma' tells if DMA transfer was complete */
i2c_put_dma_safe_msg_buf(pd->dma_buf, pd->msg, pd->stop_after_dma);
if (!timeout) {
dev_err(pd->dev, "Transfer request timed out\n");
if (pd->dma_direction != DMA_NONE)