The patch ASoC: Intel: Fix race condition in IPC rx list has been applied to the asoc tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.3 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 26ae20490809db30677dfd54f81a73ce77ba2df1 Mon Sep 17 00:00:00 2001 From: Gustaw Lewandowski <gustaw.lewandowski@xxxxxxxxx> Date: Thu, 13 Jun 2019 21:04:33 +0200 Subject: [PATCH] ASoC: Intel: Fix race condition in IPC rx list Since there are multiple IPCs being sent in a short span of time, there is a possibility of more than one message being on the Rx list after receiving response from firmware. In such cases, when the first notification of interrupt from firmware is received, driver retrieves the message from the Rx list but does not delete it from the list till the next lock. In the meantime, when another interrupt is received from the firmware, driver is reading the previous message again since the previous message has not been removed from the list. Signed-off-by: Gustaw Lewandowski <gustaw.lewandowski@xxxxxxxxx> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> --- sound/soc/intel/skylake/skl-sst-ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/intel/skylake/skl-sst-ipc.c b/sound/soc/intel/skylake/skl-sst-ipc.c index 5c9206dc7932..5094205a243f 100644 --- a/sound/soc/intel/skylake/skl-sst-ipc.c +++ b/sound/soc/intel/skylake/skl-sst-ipc.c @@ -344,6 +344,7 @@ static struct ipc_message *skl_ipc_reply_get_msg(struct sst_generic_ipc *ipc, msg = list_first_entry(&ipc->rx_list, struct ipc_message, list); + list_del(&msg->list); out: return msg; @@ -488,7 +489,6 @@ void skl_ipc_process_reply(struct sst_generic_ipc *ipc, } spin_lock_irqsave(&ipc->dsp->spinlock, flags); - list_del(&msg->list); sst_ipc_tx_msg_reply_complete(ipc, msg); spin_unlock_irqrestore(&ipc->dsp->spinlock, flags); } -- 2.20.1 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
