--- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1013,6 +1013,20 @@ static int spi_transfer_one_message(stru msecs_to_jiffies(ms)); } + if (master->transfer_status) { + ret = master->transfer_status(master, ms); + if (ret) { + SPI_STATISTICS_INCREMENT_FIELD(statm, + errors); + SPI_STATISTICS_INCREMENT_FIELD(stats, + errors); + dev_err(&msg->spi->dev, + "SPI transfer status: %d\n", + ret); + goto out; + } + } + if (ms == 0) { SPI_STATISTICS_INCREMENT_FIELD(statm, timedout); --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -370,6 +370,8 @@ static inline void spi_unregister_driver * transfer_one_message are mutually exclusive; when both * are set, the generic subsystem does not call your * transfer_one callback. + * @transfer_status: This callback allows the driver to return an error code + * in case the scheduled single spi transfer failed. * @handle_err: the subsystem calls the driver to handle an error that occurs * in the generic implementation of transfer_one_message(). * @unprepare_message: undo any work done by prepare_message(). @@ -546,6 +548,7 @@ struct spi_master { void (*set_cs)(struct spi_device *spi, bool enable); int (*transfer_one)(struct spi_master *master, struct spi_device *spi, struct spi_transfer *transfer); + int (*transfer_status)(struct spi_master *master, unsigned long timeout); void (*handle_err)(struct spi_master *master, struct spi_message *message);