[PATCH v3 6/7] staging:iio:ad2s90: Add comment to device state mutex

[Matheus Tavares]

From: Victor Colombo <victorcolo...@gmail.com>

Fix the checkpatch.pl issue:
"CHECK: struct mutex definition without comment".

Signed-off-by: Victor Colombo <victorcolo...@gmail.com>
Signed-off-by: Matheus Tavares <matheus.bernard...@usp.br>
---
Changes in v3:
 - none

Changes in v2:
 - Patch added in v2

 drivers/staging/iio/resolver/ad2s90.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/iio/resolver/ad2s90.c 
b/drivers/staging/iio/resolver/ad2s90.c
index 678351dabe6b..a41f5cb10da5 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -22,7 +22,7 @@
 #define AD2S90_MAX_SPI_FREQ_HZ  830000
 
 struct ad2s90_state {
-       struct mutex lock;
+       struct mutex lock; /* lock to protect rx buffer */
        struct spi_device *sdev;
        u8 rx[2] ____cacheline_aligned;
 };
-- 
2.18.0