[PATCH v9 3/4] i2c: tegra: use atomic poll function during configuration
From: Shardar Shariff Md
Date: Mon Aug 29 2016 - 12:37:45 EST
Use readl_poll_timeout_atomic() function as *wait_for_config_load()
function can be called from atomic context.
Signed-off-by: Shardar Shariff Md <smohammed@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-tegra.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index da79c5e..e849a44 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -437,8 +437,13 @@ 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_atomic() || irqs_disabled())
+ 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");
--
1.8.1.5