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Message-ID: <20230614051204.1614722-1-sarath.babu.naidu.gaddam@amd.com>
Date: Wed, 14 Jun 2023 10:42:04 +0530
From: Sarath Babu Naidu Gaddam <sarath.babu.naidu.gaddam@....com>
To: <richardcochran@...il.com>, <netdev@...r.kernel.org>
CC: <simon.horman@...igine.com>, <andrew@...n.ch>,
<linux-kernel@...r.kernel.org>, <vincent.cheng.xh@...esas.com>,
<harini.katakam@....com>, <git@....com>,
<sarath.babu.naidu.gaddam@....com>
Subject: [PATCH V2] ptp: clockmatrix: Add Defer probe if firmware load fails
Clock matrix driver can be probed before the rootfs containing
firmware/initialization .bin is available. The current driver
throws a warning and proceeds to execute probe even when firmware
is not ready. Instead, defer probe and wait for the .bin file to
be available.
Signed-off-by: Sarath Babu Naidu Gaddam <sarath.babu.naidu.gaddam@....com>
---
Changes in V2:
1) Added mutex_unlock(idtcm->lock); before returning EPROBE_DEFER.
2) Moved failure log after defer probe.
---
drivers/ptp/ptp_clockmatrix.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index c9d451bf89e2..b3cb136257e3 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -2424,8 +2424,13 @@ static int idtcm_probe(struct platform_device *pdev)
err = idtcm_load_firmware(idtcm, &pdev->dev);
- if (err)
+ if (err) {
+ if (err == -ENOENT) {
+ mutex_unlock(idtcm->lock);
+ return -EPROBE_DEFER;
+ }
dev_warn(idtcm->dev, "loading firmware failed with %d", err);
+ }
wait_for_chip_ready(idtcm);
--
2.25.1
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