The i2c functions need to test the pm_suspend state and do, if needed, some
retry before i2c operations. This code was repeated 4x.
The isolate this create a new function to check suspend state and call it in
every need place.
Signed-off-by: Rui Miguel Silva <rmfrfs@xxxxxxxxx>
---
drivers/staging/typec/fusb302/fusb302.c | 66 +++++++++++++++++----------------
1 file changed, 34 insertions(+), 32 deletions(-)
diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c
index 40842b8075e5..26d7e2a387c3 100644
--- a/drivers/staging/typec/fusb302/fusb302.c
+++ b/drivers/staging/typec/fusb302/fusb302.c
@@ -122,22 +122,36 @@ struct fusb302_chip {
#define FUSB302_RESUME_RETRY 10
#define FUSB302_RESUME_RETRY_SLEEP 50
-static int fusb302_i2c_write(struct fusb302_chip *chip,
- u8 address, u8 data)
+
+static bool fusb302_is_suspended(struct fusb302_chip *chip)
{
int retry_cnt;
- int ret = 0;
- atomic_set(&chip->i2c_busy, 1);
for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
if (atomic_read(&chip->pm_suspend)) {
dev_info(chip->dev, "i2c: pm suspend, retry %d/%d\n",
retry_cnt + 1, FUSB302_RESUME_RETRY);
msleep(FUSB302_RESUME_RETRY_SLEEP);
} else {
- break;
+ return false;
}
}
+
+ return true;
+}
+
+static int fusb302_i2c_write(struct fusb302_chip *chip,
+ u8 address, u8 data)
+{
+ int ret = 0;
+
+ atomic_set(&chip->i2c_busy, 1);
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
+ }
+
ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data);
if (ret < 0)
dev_err(chip->dev, "cannot write 0x%02x to 0x%02x: %d\n", data,
@@ -150,21 +164,17 @@ static int fusb302_i2c_write(struct fusb302_chip *chip,
static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
u8 length, const u8 *data)
{
- int retry_cnt;
int ret = 0;
if (length <= 0)
return ret;
atomic_set(&chip->i2c_busy, 1);
- for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
- if (atomic_read(&chip->pm_suspend)) {
- dev_info(chip->dev, "i2c: pm suspend, retry %d/%d\n",
- retry_cnt + 1, FUSB302_RESUME_RETRY);
- msleep(FUSB302_RESUME_RETRY_SLEEP);
- } else {
- break;
- }
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
}
+
ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address,
length, data);
if (ret < 0)
@@ -178,19 +188,15 @@ static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address,
static int fusb302_i2c_read(struct fusb302_chip *chip,
u8 address, u8 *data)
{
- int retry_cnt;
int ret = 0;
atomic_set(&chip->i2c_busy, 1);
- for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
- if (atomic_read(&chip->pm_suspend)) {
- dev_info(chip->dev, "i2c: pm suspend, retry %d/%d\n",
- retry_cnt + 1, FUSB302_RESUME_RETRY);
- msleep(FUSB302_RESUME_RETRY_SLEEP);
- } else {
- break;
- }
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
}
+
ret = i2c_smbus_read_byte_data(chip->i2c_client, address);
*data = (u8)ret;
if (ret < 0)
@@ -203,21 +209,17 @@ static int fusb302_i2c_read(struct fusb302_chip *chip,
static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address,
u8 length, u8 *data)
{
- int retry_cnt;
int ret = 0;
if (length <= 0)
return ret;
atomic_set(&chip->i2c_busy, 1);
- for (retry_cnt = 0; retry_cnt < FUSB302_RESUME_RETRY; retry_cnt++) {
- if (atomic_read(&chip->pm_suspend)) {
- dev_info(chip->dev, "i2c: pm suspend, retry %d/%d\n",
- retry_cnt + 1, FUSB302_RESUME_RETRY);
- msleep(FUSB302_RESUME_RETRY_SLEEP);
- } else {
- break;
- }
+
+ if (fusb302_is_suspended(chip)) {
+ atomic_set(&chip->i2c_busy, 0);
+ return -ETIMEDOUT;
}
+
ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address,
length, data);
if (ret < 0) {
--
2.12.2
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