CVE ID:	CVE-2021-47502
Description:	In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: wcd934x: handle channel mappping list correctly Currently each channel is added as list to dai channel list, however there is danger of adding same channel to multiple dai channel list which endups corrupting the other list where its already added. This patch ensures that the channel is actually free before adding to the dai channel list and also ensures that the channel is on the list before deleting it. This check was missing previously, and we did not hit this issue as we were testing very simple usecases with sequence of amixer commands.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-47502 https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72 https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72 https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101 https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101 https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1 https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1