[PATCH V3 4/6] i2c: tegra: add spinlock definition comment

[Bitan Biswas]

Fix checkpatch.pl CHECK as follows:
CHECK: spinlock_t definition without comment
+       spinlock_t xfer_lock;

Signed-off-by: Bitan Biswas <bbis...@nvidia.com>
Reviewed-by: Dmitry Osipenko <dig...@gmail.com>
---
 drivers/i2c/busses/i2c-tegra.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 2d381de..bececa6 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -269,6 +269,7 @@ struct tegra_i2c_dev {
        u32 bus_clk_rate;
        u16 clk_divisor_non_hs_mode;
        bool is_multimaster_mode;
+       /* xfer_lock: lock to serialize transfer submission and processing */
        spinlock_t xfer_lock;
        struct dma_chan *tx_dma_chan;
        struct dma_chan *rx_dma_chan;
-- 
2.7.4