mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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145 lines
4.0 KiB
Diff
145 lines
4.0 KiB
Diff
From 6d104af38b570d37aa32a5803b04c354f8ed513d Mon Sep 17 00:00:00 2001
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From: Johan Hovold <johan@kernel.org>
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Date: Thu, 12 Jan 2017 18:17:42 +0100
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Subject: HID: corsair: fix DMA buffers on stack
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Not all platforms support DMA to the stack, and specifically since v4.9
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this is no longer supported on x86 with VMAP_STACK either.
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Note that the macro-mode buffer was larger than necessary.
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Fixes: 6f78193ee9ea ("HID: corsair: Add Corsair Vengeance K90 driver")
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Cc: stable <stable@vger.kernel.org>
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Signed-off-by: Johan Hovold <johan@kernel.org>
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Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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---
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drivers/hid/hid-corsair.c | 54 ++++++++++++++++++++++++++++++++++++-----------
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1 file changed, 42 insertions(+), 12 deletions(-)
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diff --git a/drivers/hid/hid-corsair.c b/drivers/hid/hid-corsair.c
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index 717704e..5971907 100644
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--- a/drivers/hid/hid-corsair.c
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+++ b/drivers/hid/hid-corsair.c
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@@ -148,7 +148,11 @@ static enum led_brightness k90_backlight_get(struct led_classdev *led_cdev)
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struct usb_interface *usbif = to_usb_interface(dev->parent);
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struct usb_device *usbdev = interface_to_usbdev(usbif);
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int brightness;
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- char data[8];
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+ char *data;
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+
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+ data = kmalloc(8, GFP_KERNEL);
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+ if (!data)
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+ return -ENOMEM;
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ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
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K90_REQUEST_STATUS,
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@@ -158,16 +162,22 @@ static enum led_brightness k90_backlight_get(struct led_classdev *led_cdev)
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if (ret < 0) {
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dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
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ret);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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brightness = data[4];
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if (brightness < 0 || brightness > 3) {
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dev_warn(dev,
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"Read invalid backlight brightness: %02hhx.\n",
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data[4]);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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- return brightness;
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+ ret = brightness;
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+out:
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+ kfree(data);
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+
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+ return ret;
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}
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static enum led_brightness k90_record_led_get(struct led_classdev *led_cdev)
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@@ -253,7 +263,11 @@ static ssize_t k90_show_macro_mode(struct device *dev,
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struct usb_interface *usbif = to_usb_interface(dev->parent);
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struct usb_device *usbdev = interface_to_usbdev(usbif);
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const char *macro_mode;
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- char data[8];
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+ char *data;
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+
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+ data = kmalloc(2, GFP_KERNEL);
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+ if (!data)
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+ return -ENOMEM;
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ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
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K90_REQUEST_GET_MODE,
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@@ -263,7 +277,8 @@ static ssize_t k90_show_macro_mode(struct device *dev,
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if (ret < 0) {
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dev_warn(dev, "Failed to get K90 initial mode (error %d).\n",
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ret);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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switch (data[0]) {
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@@ -277,10 +292,15 @@ static ssize_t k90_show_macro_mode(struct device *dev,
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default:
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dev_warn(dev, "K90 in unknown mode: %02hhx.\n",
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data[0]);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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- return snprintf(buf, PAGE_SIZE, "%s\n", macro_mode);
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+ ret = snprintf(buf, PAGE_SIZE, "%s\n", macro_mode);
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+out:
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+ kfree(data);
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+
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+ return ret;
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}
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static ssize_t k90_store_macro_mode(struct device *dev,
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@@ -320,7 +340,11 @@ static ssize_t k90_show_current_profile(struct device *dev,
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struct usb_interface *usbif = to_usb_interface(dev->parent);
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struct usb_device *usbdev = interface_to_usbdev(usbif);
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int current_profile;
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- char data[8];
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+ char *data;
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+
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+ data = kmalloc(8, GFP_KERNEL);
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+ if (!data)
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+ return -ENOMEM;
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ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
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K90_REQUEST_STATUS,
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@@ -330,16 +354,22 @@ static ssize_t k90_show_current_profile(struct device *dev,
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if (ret < 0) {
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dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
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ret);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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current_profile = data[7];
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if (current_profile < 1 || current_profile > 3) {
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dev_warn(dev, "Read invalid current profile: %02hhx.\n",
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data[7]);
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- return -EIO;
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+ ret = -EIO;
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+ goto out;
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}
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- return snprintf(buf, PAGE_SIZE, "%d\n", current_profile);
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+ ret = snprintf(buf, PAGE_SIZE, "%d\n", current_profile);
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+out:
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+ kfree(data);
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+
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+ return ret;
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}
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static ssize_t k90_store_current_profile(struct device *dev,
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--
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cgit v1.1
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