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ptp: Add error handling for adjfine callback in ptp_clock_adjtime

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ptp_clock_adjtime sets ptp->dialed_frequency even when adjfine
callback returns an error. This causes subsequent reads to return
an incorrect value.

Fix this by adding error check before ptp->dialed_frequency is set.

Fixes: 39a8cbd9ca05 ("ptp: remember the adjusted frequency")
Signed-off-by: Ajay Kaher <ajay.kaher@broadcom.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://patch.msgid.link/20241125105954.1509971-1-ajay.kaher@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ajay Kaher 2024-11-25 10:59:54 +00:00 committed by Jakub Kicinski
parent 0a4cc4accf
commit 98337d7c87
1 changed files with 2 additions and 1 deletions
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3
drivers/ptp/ptp_clock.c
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@ -150,7 +150,8 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
if (ppb > ops->max_adj || ppb < -ops->max_adj)
return -ERANGE;
err = ops->adjfine(ops, tx->freq);
ptp->dialed_frequency = tx->freq;
if (!err)
ptp->dialed_frequency = tx->freq;
} else if (tx->modes & ADJ_OFFSET) {
if (ops->adjphase) {
s32 max_phase_adj = ops->getmaxphase(ops);