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,
linux-iio@vger.kernel.org, linux-input@vger.kernel.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [RFC PATCH v4 6/6] i2c: dev: mark RDWR buffers as DMA_SAFE
Date: Thu, 17 Aug 2017 16:14:49 +0200 [thread overview]
Message-ID: <20170817141449.23958-7-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20170817141449.23958-1-wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/i2c/i2c-dev.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 6f638bbc922db4..bbc7aadb4c899d 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -280,6 +280,8 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client,
res = PTR_ERR(rdwr_pa[i].buf);
break;
}
+ /* memdup_user allocates with GFP_KERNEL, so DMA is ok */
+ rdwr_pa[i].flags |= I2C_M_DMA_SAFE;
/*
* If the message length is received from the slave (similar
--
2.11.0
next prev parent reply other threads:[~2017-08-17 14:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-17 14:14 [RFC PATCH v4 0/6] i2c: document DMA handling and add helpers for it Wolfram Sang
2017-08-17 14:14 ` [RFC PATCH v4 1/6] i2c: add a message flag for DMA safe buffers Wolfram Sang
2017-08-17 14:14 ` [RFC PATCH v4 2/6] i2c: add helpers to ease DMA handling Wolfram Sang
2017-08-17 14:14 ` [RFC PATCH v4 3/6] i2c: add docs to clarify " Wolfram Sang
2017-08-27 11:37 ` Mauro Carvalho Chehab
2017-09-08 8:56 ` Wolfram Sang
2017-09-08 11:08 ` Mauro Carvalho Chehab
2017-09-09 15:27 ` Wolfram Sang
2017-09-09 19:34 ` Mauro Carvalho Chehab
2017-09-20 17:18 ` Wolfram Sang
2017-09-20 18:22 ` Mauro Carvalho Chehab
2017-09-20 18:45 ` Wolfram Sang
2017-08-17 14:14 ` [RFC PATCH v4 4/6] i2c: sh_mobile: use helper to decide if DMA is useful Wolfram Sang
2017-08-17 14:14 ` [RFC PATCH v4 5/6] i2c: rcar: skip DMA if buffer is not safe Wolfram Sang
2017-08-17 14:14 ` Wolfram Sang [this message]
2017-08-20 10:14 ` [RFC PATCH v4 0/6] i2c: document DMA handling and add helpers for it Jonathan Cameron
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