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From: Jonathan Cameron <jic23@kernel.org>
To: linux-iio@vger.kernel.org
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Parthiban Nallathambi <pn@denx.de>
Subject: [PATCH RESEND 7/8] iio: light: vcnl4035: Fix buffer alignment in iio_push_to_buffers_with_timestamp()
Date: Sun, 13 Jun 2021 16:23:00 +0100	[thread overview]
Message-ID: <20210613152301.571002-8-jic23@kernel.org> (raw)
In-Reply-To: <20210613152301.571002-1-jic23@kernel.org>

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Add __aligned(8) to ensure the buffer passed to
iio_push_to_buffers_with_timestamp() is suitable for the naturally
aligned timestamp that will be inserted.

Here an explicit structure is not used, because the holes would
necessitate the addition of an explict memset(), to avoid a potential
kernel data leak, making for a less minimal fix.

Fixes: 55707294c4eb ("iio: light: Add support for vishay vcnl40352")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Parthiban Nallathambi <pn@denx.de>
---
 drivers/iio/light/vcnl4035.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c
index fd2f181b16db..0db306ee910e 100644
--- a/drivers/iio/light/vcnl4035.c
+++ b/drivers/iio/light/vcnl4035.c
@@ -102,7 +102,8 @@ static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct vcnl4035_data *data = iio_priv(indio_dev);
-	u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)];
+	/* Ensure naturally aligned timestamp */
+	u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)]  __aligned(8);
 	int ret;
 
 	ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer);
-- 
2.32.0


  parent reply	other threads:[~2021-06-13 15:21 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-13 15:22 [PATCH RESEND 0/8] IIO: Alignment fixes part 3 - __aligned(8) used to ensure alignment Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 1/8] iio: adc: at91-sama5d2: Fix buffer alignment in iio_push_to_buffers_with_timestamp() Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 2/8] iio: adc: hx711: " Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 3/8] iio: adc: mxs-lradc: " Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 4/8] iio: adc: ti-ads8688: Fix alignment of buffer " Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 5/8] iio: magn: rm3100: " Jonathan Cameron
2021-06-13 15:22 ` [PATCH RESEND 6/8] iio: light: vcnl4000: Fix buffer alignment " Jonathan Cameron
2021-06-13 15:23 ` Jonathan Cameron [this message]
2021-06-13 15:23 ` [PATCH RESEND 8/8] iio: prox: isl29501: " Jonathan Cameron
2021-06-14  8:03 ` [PATCH RESEND 0/8] IIO: Alignment fixes part 3 - __aligned(8) used to ensure alignment Sa, Nuno
2021-06-14 10:43   ` Jonathan Cameron

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