[PATCH AUTOSEL 5.2 01/63] drivers: thermal: qcom: tsens: Fix memory leak from qfprom read

[PATCH AUTOSEL 5.2 01/63] drivers: thermal: qcom: tsens: Fix memory leak from qfprom read

[Sasha Levin]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

[ Upstream commit 6b8249abb093551ef173d13a25ed0044d5dd33e0 ]

memory returned as part of nvmem_read via qfprom_read should be
freed by the consumer once done.
Existing code is not doing it so fix it.

Below memory leak detected by kmemleak
   [<ffffff80088b7658>] kmemleak_alloc+0x50/0x84
    [<ffffff80081df120>] __kmalloc+0xe8/0x168
    [<ffffff80086db350>] nvmem_cell_read+0x30/0x80
    [<ffffff8008632790>] qfprom_read+0x4c/0x7c
    [<ffffff80086335a4>] calibrate_v1+0x34/0x204
    [<ffffff8008632518>] tsens_probe+0x164/0x258
    [<ffffff80084e0a1c>] platform_drv_probe+0x80/0xa0
    [<ffffff80084de4f4>] really_probe+0x208/0x248
    [<ffffff80084de2c4>] driver_probe_device+0x98/0xc0
    [<ffffff80084dec54>] __device_attach_driver+0x9c/0xac
    [<ffffff80084dca74>] bus_for_each_drv+0x60/0x8c
    [<ffffff80084de634>] __device_attach+0x8c/0x100
    [<ffffff80084de6c8>] device_initial_probe+0x20/0x28
    [<ffffff80084dcbb8>] bus_probe_device+0x34/0x7c
    [<ffffff80084deb08>] deferred_probe_work_func+0x6c/0x98
    [<ffffff80080c3da8>] process_one_work+0x160/0x2f8

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/thermal/qcom/tsens-8960.c |  2 ++
 drivers/thermal/qcom/tsens-v0_1.c | 12 ++++++++++--
 drivers/thermal/qcom/tsens-v1.c   |  1 +
 drivers/thermal/qcom/tsens.h      |  1 +
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 8d9b721dadb65..e46a4e3f25c42 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -229,6 +229,8 @@ static int calibrate_8960(struct tsens_priv *priv)
 	for (i = 0; i < num_read; i++, s++)
 		s->offset = data[i];
 
+	kfree(data);
+
 	return 0;
 }
 
diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index 6f26fadf4c279..055647bcee67d 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -145,8 +145,10 @@ static int calibrate_8916(struct tsens_priv *priv)
 		return PTR_ERR(qfprom_cdata);
 
 	qfprom_csel = (u32 *)qfprom_read(priv->dev, "calib_sel");
-	if (IS_ERR(qfprom_csel))
+	if (IS_ERR(qfprom_csel)) {
+		kfree(qfprom_cdata);
 		return PTR_ERR(qfprom_csel);
+	}
 
 	mode = (qfprom_csel[0] & MSM8916_CAL_SEL_MASK) >> MSM8916_CAL_SEL_SHIFT;
 	dev_dbg(priv->dev, "calibration mode is %d\n", mode);
@@ -181,6 +183,8 @@ static int calibrate_8916(struct tsens_priv *priv)
 	}
 
 	compute_intercept_slope(priv, p1, p2, mode);
+	kfree(qfprom_cdata);
+	kfree(qfprom_csel);
 
 	return 0;
 }
@@ -198,8 +202,10 @@ static int calibrate_8974(struct tsens_priv *priv)
 		return PTR_ERR(calib);
 
 	bkp = (u32 *)qfprom_read(priv->dev, "calib_backup");
-	if (IS_ERR(bkp))
+	if (IS_ERR(bkp)) {
+		kfree(calib);
 		return PTR_ERR(bkp);
+	}
 
 	calib_redun_sel =  bkp[1] & BKP_REDUN_SEL;
 	calib_redun_sel >>= BKP_REDUN_SHIFT;
@@ -313,6 +319,8 @@ static int calibrate_8974(struct tsens_priv *priv)
 	}
 
 	compute_intercept_slope(priv, p1, p2, mode);
+	kfree(calib);
+	kfree(bkp);
 
 	return 0;
 }
diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index 10b595d4f6199..870f502f2cb6c 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -138,6 +138,7 @@ static int calibrate_v1(struct tsens_priv *priv)
 	}
 
 	compute_intercept_slope(priv, p1, p2, mode);
+	kfree(qfprom_cdata);
 
 	return 0;
 }
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 2fd94997245bf..b89083b61c383 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -17,6 +17,7 @@
 
 #include <linux/thermal.h>
 #include <linux/regmap.h>
+#include <linux/slab.h>
 
 struct tsens_priv;
 
-- 
2.20.1

[PATCH AUTOSEL 5.2 51/63] i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630

[Sasha Levin]

From: Lee Jones <lee.jones@linaro.org>

[ Upstream commit 127068abe85bf3dee50df51cb039a5a987a4a666 ]

We have a production-level laptop (Lenovo Yoga C630) which is exhibiting
a rather horrific bug.  When I2C HID devices are being scanned for at
boot-time the QCom Geni based I2C (Serial Engine) attempts to use DMA.
When it does, the laptop reboots and the user never sees the OS.

Attempts are being made to debug the reason for the spontaneous reboot.
No luck so far, hence the requirement for this hot-fix.  This workaround
will be removed once we have a viable fix.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index db075bc0d9525..715ddc5d0eac9 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -354,11 +354,13 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 {
 	dma_addr_t rx_dma;
 	unsigned long time_left;
-	void *dma_buf;
+	void *dma_buf = NULL;
 	struct geni_se *se = &gi2c->se;
 	size_t len = msg->len;
 
-	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+	if (!of_machine_is_compatible("lenovo,yoga-c630"))
+		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
 	if (dma_buf)
 		geni_se_select_mode(se, GENI_SE_DMA);
 	else
@@ -393,11 +395,13 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
 {
 	dma_addr_t tx_dma;
 	unsigned long time_left;
-	void *dma_buf;
+	void *dma_buf = NULL;
 	struct geni_se *se = &gi2c->se;
 	size_t len = msg->len;
 
-	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+	if (!of_machine_is_compatible("lenovo,yoga-c630"))
+		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
+
 	if (dma_buf)
 		geni_se_select_mode(se, GENI_SE_DMA);
 	else
-- 
2.20.1