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Diffstat (limited to 'drivers/i2c/i2c-core-base.c')
-rw-r--r--drivers/i2c/i2c-core-base.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index f15737763608..9ee9a15e7134 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -2293,21 +2293,22 @@ u8 *i2c_get_dma_safe_msg_buf(struct i2c_msg *msg, unsigned int threshold)
2293EXPORT_SYMBOL_GPL(i2c_get_dma_safe_msg_buf); 2293EXPORT_SYMBOL_GPL(i2c_get_dma_safe_msg_buf);
2294 2294
2295/** 2295/**
2296 * i2c_release_dma_safe_msg_buf - release DMA safe buffer and sync with i2c_msg 2296 * i2c_put_dma_safe_msg_buf - release DMA safe buffer and sync with i2c_msg
2297 * @msg: the message to be synced with
2298 * @buf: the buffer obtained from i2c_get_dma_safe_msg_buf(). May be NULL. 2297 * @buf: the buffer obtained from i2c_get_dma_safe_msg_buf(). May be NULL.
2298 * @msg: the message which the buffer corresponds to
2299 * @xferred: bool saying if the message was transferred
2299 */ 2300 */
2300void i2c_release_dma_safe_msg_buf(struct i2c_msg *msg, u8 *buf) 2301void i2c_put_dma_safe_msg_buf(u8 *buf, struct i2c_msg *msg, bool xferred)
2301{ 2302{
2302 if (!buf || buf == msg->buf) 2303 if (!buf || buf == msg->buf)
2303 return; 2304 return;
2304 2305
2305 if (msg->flags & I2C_M_RD) 2306 if (xferred && msg->flags & I2C_M_RD)
2306 memcpy(msg->buf, buf, msg->len); 2307 memcpy(msg->buf, buf, msg->len);
2307 2308
2308 kfree(buf); 2309 kfree(buf);
2309} 2310}
2310EXPORT_SYMBOL_GPL(i2c_release_dma_safe_msg_buf); 2311EXPORT_SYMBOL_GPL(i2c_put_dma_safe_msg_buf);
2311 2312
2312MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>"); 2313MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
2313MODULE_DESCRIPTION("I2C-Bus main module"); 2314MODULE_DESCRIPTION("I2C-Bus main module");