From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-cpm.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 2d466538b2e2c9..714bdc837769fd 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -308,22 +308,12 @@ static int cpm_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
struct i2c_reg __iomem *i2c_reg = cpm->i2c_reg;
struct i2c_ram __iomem *i2c_ram = cpm->i2c_ram;
struct i2c_msg *pmsg;
- int ret, i;
+ int ret;
int tptr;
int rptr;
cbd_t __iomem *tbdf;
cbd_t __iomem *rbdf;
- if (num > CPM_MAXBD)
- return -EINVAL;
-
- /* Check if we have any oversized READ requests */
- for (i = 0; i < num; i++) {
- pmsg = &msgs[i];
- if (pmsg->len >= CPM_MAX_READ)
- return -EINVAL;
- }
-
/* Reset to use first buffer */
out_be16(&i2c_ram->rbptr, in_be16(&i2c_ram->rbase));
out_be16(&i2c_ram->tbptr, in_be16(&i2c_ram->tbase));
@@ -424,10 +414,18 @@ static const struct i2c_algorithm cpm_i2c_algo = {
.functionality = cpm_i2c_func,
};
+/* CPM_MAX_READ is also limiting writes according to the code! */
+static struct i2c_adapter_quirks cpm_i2c_quirks = {
+ .max_num_msgs = CPM_MAXBD,
+ .max_read_len = CPM_MAX_READ,
+ .max_write_len = CPM_MAX_READ,
+};
+
static const struct i2c_adapter cpm_ops = {
.owner = THIS_MODULE,
.name = "i2c-cpm",
.algo = &cpm_i2c_algo,
+ .quirks = &cpm_i2c_quirks,
};
static int cpm_i2c_setup(struct cpm_i2c *cpm)
--
2.1.4
--
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