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--- 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);
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