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authorZhangfei Gao <zgao6@marvell.com>2010-03-02 12:23:49 +0100
committerJean Delvare <khali@linux-fr.org>2010-03-02 12:23:49 +0100
commit0c43ea544c1086fbbed5a6c99ea58eb64674ea8f (patch)
tree1d50d78c261cd011667c12134d93f2d6d2caa6e5 /drivers/i2c/i2c-core.c
parenteec74a257f0a695688ba44c0f6c1e92dc81459be (diff)
downloadlinux-linaro-stable-0c43ea544c1086fbbed5a6c99ea58eb64674ea8f.tar.gz
i2c: Document the message size limit
i2c_master_send & i2c_master_recv do not support more than 64 kb transfer, since msg.len is u16. Signed-off-by: Zhangfei Gao <zgao6@marvell.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
-rw-r--r--drivers/i2c/i2c-core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 4131698008b9..3202a86f420e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1183,7 +1183,7 @@ EXPORT_SYMBOL(i2c_transfer);
* i2c_master_send - issue a single I2C message in master transmit mode
* @client: Handle to slave device
* @buf: Data that will be written to the slave
- * @count: How many bytes to write
+ * @count: How many bytes to write, must be less than 64k since msg.len is u16
*
* Returns negative errno, or else the number of bytes written.
*/
@@ -1210,7 +1210,7 @@ EXPORT_SYMBOL(i2c_master_send);
* i2c_master_recv - issue a single I2C message in master receive mode
* @client: Handle to slave device
* @buf: Where to store data read from slave
- * @count: How many bytes to read
+ * @count: How many bytes to read, must be less than 64k since msg.len is u16
*
* Returns negative errno, or else the number of bytes read.
*/