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X-Proofpoint-ORIG-GUID: _p_Uv7iqLmMTAfjQ5Y87a29YWa8z-AKk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA1MDA4MSBTYWx0ZWRfX99Lxp4LEkok7 NlKYmn6HyoCNMbKqjagQueVWX6PaDKObpzbMcSZ+mD5zytpamupnmTwCXIN+v3iy7HkN3Gy62Tn sSDFAgNxNcRfKO6CddO92WUwJRH4y2P3pawhqkJS1bGRcXN0IVRB5sApGoSEPQEGsFqeuIdS3es NCJnfsnA94jwBu5fKRE6hpGUxE7aG7b3riqL35UECdhkFWFkHPHzUYfhbN6Kd7oy1L9bvGVJ7I+ 09tVtn+DPWOyG9kl4Qp8HWoKXXQkz7GdxAxB/pZLUrNv9uIA8L9BBH3dkb4FMIqscNV9GV13k6N fH9ChY/zmxf1VeuklzfbJvXftaTLMMifK4VsPMI75tZOLYobIXrqKHgnKgjJwT5sO6Cxp6Wm7by FmyJBHUu5ETUsBZ0OBIiWwGXszrC/93HSQanUA9DSU9/Kxbxr/mVNz4aAjcChpHTsdGZXXjAqQv Gm/aw14hnvhC5qIAzSA== X-Proofpoint-GUID: _p_Uv7iqLmMTAfjQ5Y87a29YWa8z-AKk X-Authority-Analysis: v=2.4 cv=NprcssdJ c=1 sm=1 tr=0 ts=69847885 b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=yPCof4ZbAAAA:8 a=BcPKCTjPAAAA:8 a=VwQbUJbxAAAA:8 a=1p8k0wjoEks05fVthh8A:9 a=QEXdDO2ut3YA:10 a=MNXww67FyIVnWKX2fotq:22 On 12/9/2025 12:54 AM, Maciej W. Rozycki wrote: > Discard Vendor:Device ID matching in the PCIe failed link retraining > quirk and ignore the link status for the removal of the 2.5GT/s speed > clamp, whether applied by the quirk itself or the firmware earlier on. > Revert to the original target link speed if this final link retraining > has failed. > > This is so that link training noise in hot-plug scenarios does not make > a link remain clamped to the 2.5GT/s speed where an event race has led > the quirk to apply the speed clamp for one device, only to leave it in > place for a subsequent device to be plugged in. > > Refer to the Link Capabilities register directly for the maximum link > speed determination so as to streamline backporting. > > Fixes: a89c82249c37 ("PCI: Work around PCIe link training failures") > Tested-by: Alok Tiwari > Signed-off-by: Maciej W. Rozycki > Cc: # v6.5+ Tested-by: Alok Tiwari Tested with LTS 6.18. Thanks, Alok