diff options
Diffstat (limited to 'drivers/ptp/ptp_chardev.c')
| -rw-r--r-- | drivers/ptp/ptp_chardev.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c index 9d72ab593f13..93d574faf1fe 100644 --- a/drivers/ptp/ptp_chardev.c +++ b/drivers/ptp/ptp_chardev.c @@ -175,7 +175,10 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) } req.type = PTP_CLK_REQ_EXTTS; enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0; + if (mutex_lock_interruptible(&ptp->pincfg_mux)) + return -ERESTARTSYS; err = ops->enable(ops, &req, enable); + mutex_unlock(&ptp->pincfg_mux); break; case PTP_PEROUT_REQUEST: @@ -206,7 +209,10 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) } req.type = PTP_CLK_REQ_PEROUT; enable = req.perout.period.sec || req.perout.period.nsec; + if (mutex_lock_interruptible(&ptp->pincfg_mux)) + return -ERESTARTSYS; err = ops->enable(ops, &req, enable); + mutex_unlock(&ptp->pincfg_mux); break; case PTP_ENABLE_PPS: @@ -217,7 +223,10 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) return -EPERM; req.type = PTP_CLK_REQ_PPS; enable = arg ? 1 : 0; + if (mutex_lock_interruptible(&ptp->pincfg_mux)) + return -ERESTARTSYS; err = ops->enable(ops, &req, enable); + mutex_unlock(&ptp->pincfg_mux); break; case PTP_SYS_OFFSET_PRECISE: |