git: 7ffe1a1f6318 - main - pci: Save MSIX ctrl value before pci_mask_msix call

The branch main has been updated by kgalazka:

URL: https://cgit.FreeBSD.org/src/commit/?id=7ffe1a1f6318bb0116900114950114e5f81418fd

commit 7ffe1a1f6318bb0116900114950114e5f81418fd
Author:     Krzysztof Galazka <kgalazka@FreeBSD.org>
AuthorDate: 2025-06-17 19:17:02 +0000
Commit:     Krzysztof Galazka <kgalazka@FreeBSD.org>
CommitDate: 2025-06-17 19:17:21 +0000

    pci: Save MSIX ctrl value before pci_mask_msix call
    
    Function pci_mask_msix uses cached value of MSI-X CTRL
    register to verify if vector index is valid. Update
    that value in pci_alloc_msix_method before it is
    used to avoid kernel panic.
    
    Signed-off-by: Krzysztof Galazka <krzysztof.galazka@intel.com>
    
    Reviewed by:    jhb
    Approved by:    kbowling (mentor)
    Sponsored by:   Intel Corporation
    Differential Revision:  https://reviews.freebsd.org/D49484
---
 sys/dev/pci/pci.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
index 27355c335915..f94438cda041 100644
--- a/sys/dev/pci/pci.c
+++ b/sys/dev/pci/pci.c
@@ -1927,7 +1927,11 @@ pci_alloc_msix_method(device_t dev, device_t child, int *count)
 		}
 	}
 
-	/* Mask all vectors. */
+	/*
+	 * Mask all vectors. Note that the message index assertion in
+	 * pci_mask_msix requires msix_ctrl to be set.
+	 */
+	cfg->msix.msix_ctrl = ctrl;
 	for (i = 0; i < msgnum; i++)
 		pci_mask_msix(child, i);