clear-pkgs-linux-iot-lts2018/0331-ASoC-Intel-Skylake-Fix-FW-logging-data-corruption.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com>
Date: Mon, 7 Nov 2016 13:38:52 +0530
Subject: [PATCH] ASoC: Intel: Skylake: Fix FW logging data corruption

As per the new logging scheme introduced in latest firmware,
the log buffer read/write pointers are located at the base
of the log buffer for each core. Hence, while reading log data
during buffer wrap around, the data count needs to be decremented
to skip these pointers. This patch fixes the issue.

Change-Id: I2fc52125823cc0e317eb56d217b95ad56589df28
Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com>
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Reviewed-on:
Reviewed-by: Babu, Ramesh <ramesh.babu@intel.com>
Tested-by: Sangaraju, KarthikeyaX <karthikeyax.sangaraju@intel.com>
Reviewed-on:
Reviewed-by: audio_build
Reviewed-by: R, Dharageswari <dharageswari.r@intel.com>
Reviewed-by: Diwakar, Praveen <praveen.diwakar@intel.com>
Tested-by: Sm, Bhadur A <bhadur.a.sm@intel.com>
---
 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 1c53ba3c6172..508382d52e04 100644
--- a/sound/soc/intel/skylake/skl-sst-ipc.c
+++ b/sound/soc/intel/skylake/skl-sst-ipc.c
@@ -394,7 +394,7 @@ skl_process_log_buffer(struct sst_dsp *sst, struct skl_ipc_header header)
 		ptr[0] += write - read;
 	} else {
 		skl_dsp_write_log(sst, (void __iomem *) (base + 8 + read),
-					core, size - read);
+					core, size - 8 - read);
 		skl_dsp_write_log(sst, (void __iomem *) (base + 8),
 					core, write);
 		ptr[0] = write;
-- 
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