@@ -2506,7 +2506,7 @@ static int i2c_detect_address(struct i2c_client *temp_client,
static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
{
const unsigned short *address_list;
- struct i2c_client temp_client;
+ struct i2c_client *temp_client;
int i, err = 0;
address_list = driver->address_list;
@@ -2527,19 +2527,24 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
return 0;
/* Set up a temporary client to help detect callback */
- memset(&temp_client, 0, sizeof(temp_client));
- temp_client.adapter = adapter;
+ temp_client = kzalloc(sizeof(*temp_client), GFP_KERNEL);
+ if (!temp_client)
+ return -ENOMEM;
+
+ temp_client->adapter = adapter;
for (i = 0; address_list[i] != I2C_CLIENT_END; i += 1) {
dev_dbg(&adapter->dev,
"found normal entry for adapter %d, addr 0x%02x\n",
i2c_adapter_id(adapter), address_list[i]);
- temp_client.addr = address_list[i];
- err = i2c_detect_address(&temp_client, driver);
+ temp_client->addr = address_list[i];
+ err = i2c_detect_address(temp_client, driver);
if (unlikely(err))
break;
}
+ kfree(temp_client);
+
return err;
}
drivers/i2c/i2c-core-base.c: In function ‘i2c_detect.isra’: drivers/i2c/i2c-core-base.c:2544:1: warning: the frame size of 1312 bytes is larger than 1024 bytes [-Wframe-larger-than=] 2544 | } | ^ Fix this by allocating the temporary client structure dynamically, as it is a rather large structure (1216 bytes, depending on kernel config). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- Mostly compile-tested, as apparently I have no I2C devices for which driver->detect and driver->address_list are valid. Apparently an alternative solution was posted before, but that does not fully address the potential stack size issue: "[PATCH] i2c: core: mark i2c_detect_address noinline_for_stack". https://lore.kernel.org/20250210080217.2772467-1-suhui@nfschina.com --- drivers/i2c/i2c-core-base.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)