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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>
This commit is contained in:
Shardar Shariff Md 2016-08-31 18:58:43 +05:30 committed by Wolfram Sang
parent 89120d66fc
commit 2bc445e225
1 changed files with 7 additions and 2 deletions
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9
drivers/i2c/busses/i2c-tegra.c
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@ -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");