spi: introduce master->handle_err() callback
This callback would be useful to handle an error that occurs in the generic implementation of transfer_one_message(). The good candidate for this is to drain FIFO and / or to terminate DMA transfers when timeout happened. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -851,6 +851,9 @@ out:
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if (msg->status == -EINPROGRESS)
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msg->status = ret;
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if (msg->status)
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master->handle_err(master, msg);
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spi_finalize_current_message(master);
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return ret;
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@ -294,6 +294,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
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* transfer_one_message are mutually exclusive; when both
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* are set, the generic subsystem does not call your
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* transfer_one callback.
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* @handle_err: the subsystem calls the driver to handle and error that occurs
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* in the generic implementation of transfer_one_message().
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* @unprepare_message: undo any work done by prepare_message().
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* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
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* number. Any individual value may be -ENOENT for CS lines that
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@ -448,6 +450,8 @@ struct spi_master {
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void (*set_cs)(struct spi_device *spi, bool enable);
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int (*transfer_one)(struct spi_master *master, struct spi_device *spi,
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struct spi_transfer *transfer);
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void (*handle_err)(struct spi_master *master,
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struct spi_message *message);
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/* gpio chip select */
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int *cs_gpios;
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