From 11778fca4a83f5e3b597c75785aa5c0ee0dc518e Mon Sep 17 00:00:00 2001 From: "Kenneth D. Merry" Date: Mon, 17 Oct 2022 12:48:34 -0400 Subject: [PATCH] Fix mpr(4) panic during a firmware update. Issue Description: The RequestCredits field of IOCFacts got changed between the Phase23 firmware to Phase24 firmware. So as part of firmware update operation, driver has to free the resources & pools which are created with the Phase23 Firmware's IOCFacts data (i.e. during driver load time) and has to reallocate the resources and pools using Phase24's IOCFacts data. Here driver has freed the interrupts but missed to reallocate the interrupts and hence config page read operation is getting timed out and controller is going for recursive reinit (controller reset) operations and leading to kernel panic. Fix: Reallocate the interrupts if the interrupts are disabled as part of firmware update/downgrade operation. Submitted by: Sreekanth Ready Tested by: ken MFC after: 3 days --- sys/dev/mpr/mpr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/dev/mpr/mpr.c b/sys/dev/mpr/mpr.c index b4d3f3269db..8450ef9900b 100644 --- a/sys/dev/mpr/mpr.c +++ b/sys/dev/mpr/mpr.c @@ -740,7 +740,7 @@ mpr_iocfacts_allocate(struct mpr_softc *sc, uint8_t attaching) * XXX If the number of MSI-X vectors changes during re-init, this * won't see it and adjust. */ - if (attaching && (error = mpr_pci_setup_interrupts(sc)) != 0) { + if ((attaching || reallocating) && (error = mpr_pci_setup_interrupts(sc)) != 0) { mpr_dprint(sc, MPR_INIT|MPR_ERROR, "Failed to setup interrupts\n"); mpr_free(sc);