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xhci: workaround CSS timeout on AMD SNPS 3.0 xHC
Occasionally AMD SNPS 3.0 xHC does not respond to CSS when set, also it does not flag anything on SRE and HCE to point the internal xHC errors on USBSTS register. This stalls the entire system wide suspend and there is no point in stalling just because of xHC CSS is not responding. To work around this problem, if the xHC does not flag anything on SRE and HCE, we can skip the CSS timeout and allow the system to continue the suspend. Once the system resume happens we can internally reset the controller using XHCI_RESET_ON_RESUME quirk Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Signed-off-by: Sandeep Singh <Sandeep.Singh@amd.com> cc: Nehal Shah <Nehal-bakulchandra.Shah@amd.com> Cc: <stable@vger.kernel.org> Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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