From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shinya Kuribayashi Subject: [PATCH v2 13/22] i2c-designware: i2c_dw_xfer_msg: Introduce a local "buf" pointer Date: Fri, 06 Nov 2009 21:49:14 +0900 Message-ID: <4AF41B4A.8050102@necel.com> References: <4AF419B6.1000802@necel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4AF419B6.1000802-jaWZhaxaiAMAvxtiuMwx3w@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org, ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-i2c@vger.kernel.org While we have a local variable "buf_len" for dev->tx_buf_len, we don't have such local variable for dev->tx_buf pointer. While "buf_len" is restored at first then updated when we start processing a new i2c_msg (determined by STATUS_WRITE_IN_PROGRESS flag), ->tx_buf is different. Such inconsistency makes the code slightly hard to follow. Signed-off-by: Shinya Kuribayashi Acked-by: Baruch Siach --- drivers/i2c/busses/i2c-designware.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c index da5612b..e8e2212 100644 --- a/drivers/i2c/busses/i2c-designware.c +++ b/drivers/i2c/busses/i2c-designware.c @@ -364,6 +364,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) int rx_limit = dev->rx_fifo_depth - readl(dev->base + DW_IC_RXFLR); u32 addr = msgs[dev->msg_write_idx].addr; u32 buf_len = dev->tx_buf_len; + u8 *buf = dev->tx_buf;; intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT | DW_IC_INTR_RX_FULL; @@ -384,7 +385,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) { /* new i2c_msg */ - dev->tx_buf = msgs[dev->msg_write_idx].buf; + buf = msgs[dev->msg_write_idx].buf; buf_len = msgs[dev->msg_write_idx].len; } @@ -393,11 +394,11 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) writel(0x100, dev->base + DW_IC_DATA_CMD); rx_limit--; } else - writel(*(dev->tx_buf++), - dev->base + DW_IC_DATA_CMD); + writel(*buf++, dev->base + DW_IC_DATA_CMD); tx_limit--; buf_len--; } + dev->tx_buf = buf; dev->tx_buf_len = buf_len; if (buf_len > 0) { -- 1.6.5.2