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 <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index ed9489d..4eaac3a5 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -294,6 +294,8 @@
* transfer_one_message are mutually exclusive; when both
* are set, the generic subsystem does not call your
* transfer_one callback.
+ * @handle_err: the subsystem calls the driver to handle and error that occurs
+ * in the generic implementation of transfer_one_message().
* @unprepare_message: undo any work done by prepare_message().
* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
* number. Any individual value may be -ENOENT for CS lines that
@@ -448,6 +450,8 @@
void (*set_cs)(struct spi_device *spi, bool enable);
int (*transfer_one)(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *transfer);
+ void (*handle_err)(struct spi_master *master,
+ struct spi_message *message);
/* gpio chip select */
int *cs_gpios;
