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ASoC: SOF: fix race in FW boot timeout handling 

A race condition exists in handling firmware boot timeout.
If FW sends FW_READY just after boot timeout has expired in
driver, a kernel exception will result as FW_READY handler
will be run while the state is still being cleaned up in
snd_sof_run_firmware(). Avoid the race by setting
boot_complete also in the error case.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kai Vehmanen 2019-05-09 15:10:23 -05:00 committed by Mark Brown
parent 8d01c3c73c
commit a69270d8bf
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1 changed files with 2 additions and 0 deletions
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2
sound/soc/sof/loader.c
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@ -372,6 +372,8 @@ int snd_sof_run_firmware(struct snd_sof_dev *sdev)
msecs_to_jiffies(sdev->boot_timeout));
if (ret == 0) {
dev_err(sdev->dev, "error: firmware boot failure\n");
/* after this point FW_READY msg should be ignored */
sdev->boot_complete = true;
snd_sof_dsp_dbg_dump(sdev, SOF_DBG_REGS | SOF_DBG_MBOX |
SOF_DBG_TEXT | SOF_DBG_PCI);
return -EIO;