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79 lines
2.5 KiB
Diff
79 lines
2.5 KiB
Diff
6 years ago
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From 785c44fa278b7dd7a4b96c64321dc43fa2220f7d Mon Sep 17 00:00:00 2001
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From: James Hughes <james.hughes@raspberrypi.org>
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Date: Fri, 27 Apr 2018 10:13:35 +0100
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Subject: [PATCH 285/454] Reduce log spam when mailbox call not implemented
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This changes the logging message when a mailbox call
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fails to the dev_dbg level. In addition, it fixes the
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low voltage detection logging code so that if the
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mailbox call doies fails, it logs at error level
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and flags so the call is no longer attempted.
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Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
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---
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drivers/firmware/raspberrypi.c | 23 ++++++++++++++++++-----
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1 file changed, 18 insertions(+), 5 deletions(-)
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -151,7 +151,7 @@ int rpi_firmware_property_list(struct rp
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* error, if there were multiple tags in the request.
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* But single-tag is the most common, so go with it.
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*/
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- dev_err(fw->cl.dev, "Request 0x%08x returned status 0x%08x\n",
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+ dev_dbg(fw->cl.dev, "Request 0x%08x returned status 0x%08x\n",
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buf[2], buf[1]);
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ret = -EINVAL;
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}
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@@ -204,6 +204,7 @@ EXPORT_SYMBOL_GPL(rpi_firmware_property)
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static int rpi_firmware_get_throttled(struct rpi_firmware *fw, u32 *value)
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{
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+ static int old_firmware;
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static ktime_t old_timestamp;
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static u32 old_value;
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u32 new_sticky, old_sticky, new_uv, old_uv;
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@@ -214,6 +215,9 @@ static int rpi_firmware_get_throttled(st
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if (!fw)
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return -EBUSY;
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+ if (old_firmware)
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+ return -EINVAL;
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+
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/*
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* We can't run faster than the sticky shift (100ms) since we get
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* flipping in the sticky bits that are cleared.
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@@ -232,8 +236,17 @@ static int rpi_firmware_get_throttled(st
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ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_THROTTLED,
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value, sizeof(*value));
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- if (ret)
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+
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+ if (ret) {
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+ /* If the mailbox call fails once, then it will continue to
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+ * fail in the future, so no point in continuing to call it
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+ * Usual failure reason is older firmware
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+ */
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+ old_firmware = 1;
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+ dev_err(fw->cl.dev, "Get Throttled mailbox call failed");
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+
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return ret;
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+ }
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new_sticky = *value >> 16;
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old_sticky = old_value >> 16;
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@@ -270,10 +283,10 @@ static void get_throttled_poll(struct wo
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int ret;
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ret = rpi_firmware_get_throttled(fw, &dummy);
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- if (ret)
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- pr_debug("%s: Failed to read value (%d)", __func__, ret);
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- schedule_delayed_work(&fw->get_throttled_poll_work, 2 * HZ);
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+ /* Only reschedule if we are getting valid responses */
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+ if (!ret)
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+ schedule_delayed_work(&fw->get_throttled_poll_work, 2 * HZ);
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}
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static ssize_t get_throttled_show(struct device *dev,
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