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ptp: Return -EFAULT on copy_to_user() errors 

copy_to_user() returns the number of bytes remaining, but we want a
negative error code in ptp_ioctl.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Dan Carpenter 2011-05-29 22:53:12 +03:00 committed by John Stultz
parent 1fa7b6a29c
commit e23ef227d1
1 changed files with 2 additions and 1 deletions
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3
drivers/ptp/ptp_chardev.c
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@ -46,7 +46,8 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
caps.n_ext_ts = ptp->info->n_ext_ts;
caps.n_per_out = ptp->info->n_per_out;
caps.pps = ptp->info->pps;
err = copy_to_user((void __user *)arg, &caps, sizeof(caps));
if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
err = -EFAULT;
break;
case PTP_EXTTS_REQUEST: