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https://github.com/Divested-Mobile/DivestOS-Build.git
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35 lines
1.4 KiB
Diff
35 lines
1.4 KiB
Diff
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From d740e7228bd1578ed01762998b2a86e7df56e608 Mon Sep 17 00:00:00 2001
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From: Andrew Chant <achant@google.com>
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Date: Fri, 2 Dec 2016 20:49:26 -0800
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Subject: [PATCH] input: synaptics_dsx: reallocate buffer under lock.
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Prevent concurrent usage & re-allocation of the wr_buf variable.
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Based off patch by chengengjia <chengjia4574@gmail.com>.
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BUG: 33001936
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Change-Id: I88d78e1ec0fc9e88b1e6824c06161b67d01136ec
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Signed-off-by: Andrew Chant <achant@google.com>
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---
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drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_i2c.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_i2c.c b/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_i2c.c
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index 5312f86a93470..3acd4d54bb6d5 100644
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--- a/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_i2c.c
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+++ b/drivers/input/touchscreen/synaptics_dsx_htc_2.6/synaptics_dsx_i2c.c
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@@ -557,11 +557,11 @@ static int synaptics_rmi4_i2c_write(struct synaptics_rmi4_data *rmi4_data,
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struct i2c_client *i2c = to_i2c_client(rmi4_data->pdev->dev.parent);
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struct i2c_msg msg[1];
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+ mutex_lock(&rmi4_data->rmi4_io_ctrl_mutex);
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+
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retval = synaptics_rmi4_i2c_alloc_buf(rmi4_data, length + 1);
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if (retval < 0)
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- return retval;
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-
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- mutex_lock(&rmi4_data->rmi4_io_ctrl_mutex);
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+ goto exit;
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retval = synaptics_rmi4_i2c_set_page(rmi4_data, addr);
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if (retval != PAGE_SELECT_LEN) {
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