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authorShardar Shariff Md <smohammed@nvidia.com>2016-08-31 18:58:43 +0530
committerWolfram Sang <wsa@the-dreams.de>2016-09-08 22:34:23 +0200
commit2bc445e2253f963412083c3eb1fc92a276086389 (patch)
treeb8418e7a9b779a4adfceae3d1b500df1af79c626
parent89120d66fce9b6df4b9300fab373676648994cb8 (diff)
downloadlinux-2bc445e2253f963412083c3eb1fc92a276086389.tar.bz2
i2c: tegra: use atomic poll function during configuration
Use readl_poll_timeout_atomic() function as *wait_for_config_load() function can be called from interrupt context. Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--drivers/i2c/busses/i2c-tegra.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index daab0cea20b4..243753564110 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -457,8 +457,13 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_CONFIG_LOAD);
addr = i2c_dev->base + reg_offset;
i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
- err = readl_poll_timeout(addr, val, val == 0, 1000,
- I2C_CONFIG_LOAD_TIMEOUT);
+ if (in_interrupt())
+ err = readl_poll_timeout_atomic(addr, val, val == 0,
+ 1000, I2C_CONFIG_LOAD_TIMEOUT);
+ else
+ err = readl_poll_timeout(addr, val, val == 0,
+ 1000, I2C_CONFIG_LOAD_TIMEOUT);
+
if (err) {
dev_warn(i2c_dev->dev,
"timeout waiting for config load\n");