| Message ID | 1520860502-14886-3-git-send-email-absahu@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c index ac5edfa..75e9819 100644 --- a/drivers/i2c/busses/i2c-qup.c +++ b/drivers/i2c/busses/i2c-qup.c @@ -835,6 +835,8 @@ static int qup_i2c_bam_do_xfer(struct qup_i2c_dev *qup, struct i2c_msg *msg, } if (ret || qup->bus_err || qup->qup_err) { + reinit_completion(&qup->xfer); + if (qup_i2c_change_state(qup, QUP_RUN_STATE)) { dev_err(qup->dev, "change to run state timed out"); goto desc_err;
The QUP BSLP BAM generates the following error sometimes if the current I2C DMA transfer fails and the flush operation has been scheduled “bam-dma-engine 7884000.dma: Cannot free busy channel” If any I2C error comes during BAM DMA transfer, then the QUP I2C interrupt will be generated and the flush operation will be carried out to make I2C consume all scheduled DMA transfer. Currently, the same completion structure is being used for BAM transfer which has already completed without reinit. It will make flush operation wait_for_completion_timeout completed immediately and will proceed for freeing the DMA resources where the descriptors are still in process. Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Acked-by: Sricharan R <sricharan@codeaurora.org> Reviewed-by: Austin Christ <austinwc@codeaurora.org> Reviewed-by: Andy Gross <andy.gross@linaro.org> --- * Changes from v1: 1. Removed copyright and added in separate patch with SPDX license change drivers/i2c/busses/i2c-qup.c | 2 ++ 1 file changed, 2 insertions(+)