From: Wolfram Sang <wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-input-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-media-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Wolfram Sang
<wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>,
Jonathan Cameron
<Jonathan.Cameron-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Subject: [PATCH v6 3/9] i2c: dev: mark RDWR buffers as DMA_SAFE
Date: Sat, 4 Nov 2017 21:20:03 +0100 [thread overview]
Message-ID: <20171104202009.3818-4-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20171104202009.3818-1-wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Signed-off-by: Wolfram Sang <wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>
---
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:[~2017-11-04 20:20 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-04 20:20 [PATCH v6 0/9] i2c: document DMA handling and add helpers for it Wolfram Sang
2017-11-04 20:20 ` [PATCH v6 1/9] i2c: add a message flag for DMA safe buffers Wolfram Sang
[not found] ` <20171104202009.3818-1-wsa+renesas-jBu1N2QxHDJrcw3mvpCnnVaTQe2KTcn/@public.gmane.org>
2017-11-04 20:20 ` [PATCH v6 2/9] i2c: add helpers to ease DMA handling Wolfram Sang
2017-11-04 20:20 ` Wolfram Sang [this message]
2017-11-04 20:20 ` [PATCH v6 4/9] i2c: refactor i2c_master_{send_recv} Wolfram Sang
2017-11-11 0:03 ` Jonathan Cameron
2017-11-04 20:20 ` [PATCH v6 5/9] i2c: add i2c_master_{send|recv}_dmasafe Wolfram Sang
2017-11-11 0:08 ` Jonathan Cameron
2017-11-04 20:20 ` [PATCH v6 6/9] i2c: smbus: use DMA safe buffers for emulated SMBus transactions Wolfram Sang
2017-11-11 0:13 ` Jonathan Cameron
2017-11-04 20:20 ` [PATCH v6 7/9] i2c: add docs to clarify DMA handling Wolfram Sang
2017-11-04 20:20 ` [PATCH v6 8/9] i2c: sh_mobile: use core helper to decide when to use DMA Wolfram Sang
2017-11-04 20:20 ` [PATCH v6 9/9] i2c: rcar: skip DMA if buffer is not safe Wolfram Sang
2017-11-08 22:50 ` [PATCH v6 0/9] i2c: document DMA handling and add helpers for it Mark Brown
2017-11-27 18:51 ` Wolfram Sang
2017-11-28 15:34 ` Mark Brown
2017-12-03 19:43 ` Wolfram Sang
2017-12-04 22:05 ` Mark Brown
2017-12-05 11:00 ` Jonathan Cameron
2017-12-04 21:25 ` Wolfram Sang
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