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From: Daniel Campello <campello@chromium.org>
To: LKML <devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Daniel Campello <campello@chromium.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Douglas Anderson <dianders@chromium.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Stephen Boyd <swboyd@chromium.org>,
	linux-iio@vger.kernel.org
Subject: [PATCH v3 06/15] iio: sx9310: Fixes various memory handling
Date: Fri, 31 Jul 2020 10:48:43 -0600
Message-ID: <20200731104555.v3.6.I8accffd77d616cb55b29bc3021cb0f5e1da3b68a@changeid> (raw)
In-Reply-To: <20200731164853.3020946-1-campello@chromium.org>

Makes use __aligned(8) to ensure that the timestamp is correctly aligned
when we call io_push_to_buffers_with_timestamp().
Also makes use of sizeof() for regmap_bulk_read instead of static value.

Signed-off-by: Daniel Campello <campello@chromium.org>
---

Changes in v3:
 - Changed buffer to struct type to align timestamp memory properly.

Changes in v2:
 - Fixed commit message from "iio: sx9310: Align memory"

 drivers/iio/proximity/sx9310.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/proximity/sx9310.c b/drivers/iio/proximity/sx9310.c
index 2ed062d01634bc..c46584b4817b4a 100644
--- a/drivers/iio/proximity/sx9310.c
+++ b/drivers/iio/proximity/sx9310.c
@@ -132,8 +132,11 @@ struct sx9310_data {
 	 */
 	bool prox_stat[SX9310_NUM_CHANNELS];
 	bool trigger_enabled;
-	__be16 buffer[SX9310_NUM_CHANNELS +
-		      4]; /* 64-bit data + 64-bit timestamp */
+	/* Ensure correct alignment of timestamp when present. */
+	struct {
+		__be16 channels[SX9310_NUM_CHANNELS];
+		s64 ts __aligned(8);
+	} buffer;
 	/* Remember enabled channels and sample rate during suspend. */
 	unsigned int suspend_ctrl0;
 	struct completion completion;
@@ -346,7 +349,7 @@ static int sx9310_read_prox_data(struct sx9310_data *data,
 	if (ret < 0)
 		return ret;
 
-	return regmap_bulk_read(data->regmap, chan->address, val, 2);
+	return regmap_bulk_read(data->regmap, chan->address, val, sizeof(*val));
 }
 
 /*
@@ -697,10 +700,10 @@ static irqreturn_t sx9310_trigger_handler(int irq, void *private)
 		if (ret < 0)
 			goto out;
 
-		data->buffer[i++] = val;
+		data->buffer.channels[i++] = val;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer.channels,
 					   pf->timestamp);
 
 out:
-- 
2.28.0.163.g6104cc2f0b6-goog


  parent reply index

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31 16:48 [PATCH v3 00/15] sx9310 iio driver updates Daniel Campello
2020-07-31 16:48 ` [PATCH v3 01/15] dt-bindings: iio: Add bindings for sx9310 sensor Daniel Campello
2020-07-31 22:47   ` Rob Herring
2020-08-01 15:06   ` Jonathan Cameron
2020-08-03 19:00     ` Stephen Boyd
2020-08-04  2:01       ` Rob Herring
2020-08-06 18:14         ` Jonathan Cameron
2020-08-06 22:12           ` Rob Herring
2020-08-06 23:03             ` Stephen Boyd
2020-07-31 16:48 ` [PATCH v3 02/15] iio: sx9310: Update macros declarations Daniel Campello
2020-08-01 14:47   ` Jonathan Cameron
2020-07-31 16:48 ` [PATCH v3 03/15] iio: sx9310: Fix irq handling Daniel Campello
2020-07-31 18:03   ` Stephen Boyd
2020-07-31 18:35   ` Andy Shevchenko
2020-07-31 16:48 ` [PATCH v3 04/15] iio: sx9310: Remove acpi and of table macros Daniel Campello
2020-07-31 16:48 ` [PATCH v3 05/15] iio: sx9310: Change from .probe to .probe_new Daniel Campello
2020-07-31 16:48 ` Daniel Campello [this message]
2020-07-31 19:24   ` [PATCH v3 06/15] iio: sx9310: Fixes various memory handling Andy Shevchenko
2020-08-01 14:52     ` Jonathan Cameron
2020-07-31 16:48 ` [PATCH v3 07/15] iio: sx9310: Use long instead of int for channel bitmaps Daniel Campello
2020-07-31 18:38   ` Stephen Boyd
2020-07-31 16:48 ` [PATCH v3 08/15] iio: sx9310: Use regmap_read_poll_timeout() for compensation Daniel Campello
2020-07-31 18:39   ` Stephen Boyd
2020-07-31 16:48 ` [PATCH v3 09/15] iio: sx9310: Update copyright Daniel Campello
2020-07-31 16:48 ` [PATCH v3 10/15] iio: sx9310: Simplify error return handling Daniel Campello
2020-07-31 16:48 ` [PATCH v3 11/15] iio: sx9310: Use variable to hold &client->dev Daniel Campello
2020-07-31 16:48 ` [PATCH v3 12/15] iio: sx9310: Miscellaneous format fixes Daniel Campello
2020-07-31 16:48 ` [PATCH v3 13/15] iio: sx9310: Drop channel_users[] Daniel Campello
2020-07-31 16:48 ` [PATCH v3 14/15] iio: sx9310: Enable vdd and svdd regulators at probe Daniel Campello
2020-07-31 16:48 ` [PATCH v3 15/15] iio: sx9310: Use irq trigger flags from firmware Daniel Campello
2020-07-31 19:46   ` Andy Shevchenko
2020-08-01 15:01     ` Jonathan Cameron

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