From: Beniamino Galvani <b.galvani@gmail.com>
Date: Sat, 22 Nov 2014 15:21:39 +0000 (+0100)
Subject: spi: core: Add spi_transfer_is_last() helper
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b671358ad7916beb7ca9e5c304ae88afc7da4557;p=deliverable%2Flinux.git

spi: core: Add spi_transfer_is_last() helper

This adds the function spi_transfer_is_last() which can be used by
drivers to know whether a given transfer is the last one in the
current message.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 46d188a9947c..a6ef2a8e6de4 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -1049,4 +1049,10 @@ spi_unregister_device(struct spi_device *spi)
 extern const struct spi_device_id *
 spi_get_device_id(const struct spi_device *sdev);
 
+static inline bool
+spi_transfer_is_last(struct spi_master *master, struct spi_transfer *xfer)
+{
+	return list_is_last(&xfer->transfer_list, &master->cur_msg->transfers);
+}
+
 #endif /* __LINUX_SPI_H */