From: Anshumali Gaur Date: Tue, 3 Feb 2026 05:07:01 +0000 (+0530) Subject: octeontx2-af: Fix PF driver crash with kexec kernel booting X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d2d574309e3ae84ee794869a5da8b4c38753a94;p=thirdparty%2Fkernel%2Flinux.git octeontx2-af: Fix PF driver crash with kexec kernel booting During a kexec reboot the hardware is not power-cycled, so AF state from the old kernel can persist into the new kernel. When AF and PF drivers are built as modules, the PF driver may probe before AF reinitializes the hardware. The PF driver treats the RVUM block revision as an indication that AF initialization is complete. If this value is left uncleared at shutdown, PF may incorrectly assume AF is ready and access stale hardware state, leading to a crash. Clear the RVUM block revision during AF shutdown to avoid PF mis-detecting AF readiness after kexec. Fixes: 54494aa5d1e6 ("octeontx2-af: Add Marvell OcteonTX2 RVU AF driver") Signed-off-by: Anshumali Gaur Reviewed-by: Jacob Keller Link: https://patch.msgid.link/20260203050701.2616685-1-agaur@marvell.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c index 747fbdf2a908f..8530df8b3fdaf 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c @@ -3632,11 +3632,22 @@ static void rvu_remove(struct pci_dev *pdev) devm_kfree(&pdev->dev, rvu); } +static void rvu_shutdown(struct pci_dev *pdev) +{ + struct rvu *rvu = pci_get_drvdata(pdev); + + if (!rvu) + return; + + rvu_clear_rvum_blk_revid(rvu); +} + static struct pci_driver rvu_driver = { .name = DRV_NAME, .id_table = rvu_id_table, .probe = rvu_probe, .remove = rvu_remove, + .shutdown = rvu_shutdown, }; static int __init rvu_init_module(void)