lkml.org 
[lkml]   [2023]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] spi: introduce SPI_TRANS_FAIL_IO for error reporting
Date
The default message transfer implementation - spi_transfer_one_message -
invokes the specific device driver's transfer_one(), then waits for
completion. However, there is no mechanism for the device driver to
report failure in the middle of the transfer.

Introduce SPI_TRANS_FAIL_IO for drivers to report transfer failure.

Signed-off-by: Nam Cao <namcao@linutronix.de>
---
drivers/spi/spi.c | 3 +++
include/linux/spi/spi.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 8ead7acb99f3..a4b8c07c5951 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1361,6 +1361,9 @@ static int spi_transfer_wait(struct spi_controller *ctlr,
"SPI transfer timed out\n");
return -ETIMEDOUT;
}
+
+ if (xfer->error & SPI_TRANS_FAIL_IO)
+ return -EIO;
}

return 0;
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 7b4baff63c5c..ddadae2e1ead 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -1040,6 +1040,7 @@ struct spi_transfer {
unsigned len;

#define SPI_TRANS_FAIL_NO_START BIT(0)
+#define SPI_TRANS_FAIL_IO BIT(1)
u16 error;

dma_addr_t tx_dma;
--
2.39.2
\
 
 \ /
  Last update: 2023-11-29 14:33    [W:0.078 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site