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HID: hidraw: enforce minors_lock locking via lockdep 

lockdep is much more powerful enforcing the locking rules than code comments,
so let's switch to it.

Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2018-11-08 22:38:42 +01:00
parent ecb4d529f1
commit cc7ed49a7f
1 changed files with 4 additions and 4 deletions
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8
drivers/hid/hidraw.c
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@ -107,8 +107,6 @@ out:
/*
* The first byte of the report buffer is expected to be a report number.
*
* This function is to be called with the minors_lock mutex held.
*/
static ssize_t hidraw_send_report(struct file *file, const char __user *buffer, size_t count, unsigned char report_type)
{
@ -117,6 +115,8 @@ static ssize_t hidraw_send_report(struct file *file, const char __user *buffer,
__u8 *buf;
int ret = 0;
lockdep_assert_held(&minors_lock);
if (!hidraw_table[minor] || !hidraw_table[minor]->exist) {
ret = -ENODEV;
goto out;
@ -181,8 +181,6 @@ static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t
* of buffer is the report number to request, or 0x0 if the defice does not
* use numbered reports. The report_type parameter can be HID_FEATURE_REPORT
* or HID_INPUT_REPORT.
*
* This function is to be called with the minors_lock mutex held.
*/
static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t count, unsigned char report_type)
{
@ -192,6 +190,8 @@ static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t
int ret = 0, len;
unsigned char report_number;
lockdep_assert_held(&minors_lock);
if (!hidraw_table[minor] || !hidraw_table[minor]->exist) {
ret = -ENODEV;
goto out;