Merge tag 'regmap-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "The main thing this time around has been some improvments to async
  I/O.

   - Cleaned up the async I/O support and extended it to allow single
     register writes more easily.  This is now used where possible for
     internally generated I/O, providing performance improvements for
     devices that can do async I/O.
   - An API for issuing a sequence of register writes as a single
     operation.  Some devices and buses can take advantage of this to do
     the I/O faster.
   - Addition of regmap_field APIs which help drivers for devices with
     repeated IPs or which move registers around between revisions to
     share helpers.
   - Support for SPMI buses"

* tag 'regmap-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: add SPMI support
  regmap: debugfs: Fix a boot time crash with early regmap init
  regmap: irq: clear status when disable irq
  regmap: Only send a single buffer for async I/O if writing one register
  regmap: spi: Handle async writes of only one buffer
  regmap: new API regmap_multi_reg_write() definition
  regmap: Use async I/O during cache sync
  regmap: Use async I/O for patch application
  regmap: Fix regmap_bulk_write single-rw mutex deadlock
  regmap: Provide asynchronous write and update bits operations
  regmap: Simplify the initiation of async I/O
  regmap: Don't generate gather writes for single register raw writes
  regmap: Cache async work structures
  regmap: add helper macro to set min/max range of register
  regmap: Add regmap_fields APIs
  regmap: add regmap_field_update_bits()

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c
index 4c506bd..37f12ae 100644
--- a/drivers/base/regmap/regmap-spi.c
+++ b/drivers/base/regmap/regmap-spi.c
@@ -73,7 +73,8 @@ static int regmap_spi_async_write(void *context,
 
 	spi_message_init(&async->m);
 	spi_message_add_tail(&async->t[0], &async->m);
-	spi_message_add_tail(&async->t[1], &async->m);
+	if (val)
+		spi_message_add_tail(&async->t[1], &async->m);
 
 	async->m.complete = regmap_spi_complete;
 	async->m.context = async;