On Fri, May 09, 2025 at 12:30:12PM +1000, Wilfred Mallawa wrote: > From: Wilfred Mallawa <wilfred.mallawa@xxxxxxx> > > The PCIe link may go down in cases like firmware crashes or unstable > connections. When this occurs, the PCIe slot must be reset to restore > functionality. However, the current driver lacks link down handling, > forcing users to reboot the system to recover. > > This patch implements the `reset_slot` callback for link down handling > for DWC PCIe host controller. In which, the RC is reset, reconfigured > and link training initiated to recover from the link down event. > > This patch by extension fixes issues with sysfs initiated bus resets. > In that, currently, when a sysfs initiated bus reset is issued, the > endpoint device is non-functional after (may link up with downgraded link > status). With this patch adding support for link down recovery, a sysfs > initiated bus reset works as intended. Testing conducted on a ROCK5B board > with an M.2 NVMe drive. > > Signed-off-by: Wilfred Mallawa <wilfred.mallawa@xxxxxxx> > --- > base-commit: 08733088b566b58283f0f12fb73f5db6a9a9de30 > change-id: 20250430-b4-pci_dwc_reset_support-d720dbafb7ea > prerequisite-change-id: 20250404-pcie-reset-slot-730bfa71a202:v4 > prerequisite-patch-id: 2dad85eb26838d89569b12c19d70f392fa592667 > prerequisite-patch-id: 6238a682bd8e9476e5911b7a59263c3fc618d63e > prerequisite-patch-id: 37cab00bc255a62b1e8396a48a3afba5e1751abd > prerequisite-patch-id: ff711f65cf9926374646b76cd38bdd823d576764 > prerequisite-patch-id: 1654cca919d024b9a9190b28e90f722975c797e8 Now when all the prerequisite-patches have been merged to the pci/slot-reset branch, any chance of getting this patch queued up on pci/slot-reset branch as well? Kind regards, Niklas
