summaryrefslogtreecommitdiff
path: root/drivers/hwmon/amc6821.c
diff options
context:
space:
mode:
authorGaurav Kohli <gkohli@codeaurora.org>2018-01-23 13:16:34 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-01-23 08:57:37 +0100
commitb027e2298bd588d6fa36ed2eda97447fb3eac078 (patch)
tree3b90cee88ac74c2828b90b67d67cf7adf6e9e310 /drivers/hwmon/amc6821.c
parent09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 (diff)
tty: fix data race between tty_init_dev and flush of buf
There can be a race, if receive_buf call comes before tty initialization completes in n_tty_open and tty->disc_data may be NULL. CPU0 CPU1 ---- ---- 000|n_tty_receive_buf_common() n_tty_open() -001|n_tty_receive_buf2() tty_ldisc_open.isra.3() -002|tty_ldisc_receive_buf(inline) tty_ldisc_setup() Using ldisc semaphore lock in tty_init_dev till disc_data initializes completely. Signed-off-by: Gaurav Kohli <gkohli@codeaurora.org> Reviewed-by: Alan Cox <alan@linux.intel.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwmon/amc6821.c')
0 files changed, 0 insertions, 0 deletions