From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [RFC PATCH 3/4] i2c: sh_mobile: use helper to decide if DMA is used
Date: Tue, 6 Jun 2017 11:20:33 +0200 [thread overview]
Message-ID: <20170606092034.1516-4-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20170606092034.1516-1-wsa+renesas@sang-engineering.com>
This ensures also that we fall back to PIO if the buffer is not DMA
capable.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/i2c/busses/i2c-sh_mobile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 3d75593487454c..58e2ae3b4c4751 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -666,7 +666,7 @@ static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg,
pd->pos = -1;
pd->sr = 0;
- if (pd->msg->len > 8)
+ if (i2c_check_msg_for_dma(pd->msg, 8) == 0)
sh_mobile_i2c_xfer_dma(pd);
/* Enable all interrupts to begin with */
--
2.11.0
next prev parent reply other threads:[~2017-06-06 9:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-06 9:20 [RFC PATCH 0/4] i2c: document DMA handling and add helper Wolfram Sang
2017-06-06 9:20 ` [RFC PATCH 1/4] i2c: add helper to determine if DMA is favoured Wolfram Sang
2017-06-06 9:20 ` [RFC PATCH 2/4] i2c: add docs to clarify DMA handling Wolfram Sang
2017-06-06 10:03 ` Geert Uytterhoeven
2017-06-06 10:24 ` Wolfram Sang
2017-06-06 10:37 ` Geert Uytterhoeven
2017-06-06 10:54 ` Wolfram Sang
2017-06-06 11:12 ` Geert Uytterhoeven
2017-06-06 11:23 ` Wolfram Sang
2017-06-06 15:29 ` Geert Uytterhoeven
2017-06-06 9:20 ` Wolfram Sang [this message]
2017-06-06 9:20 ` [RFC PATCH 4/4] i2c: rcar: check for DMA-capable buffers Wolfram Sang
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