The branch main has been updated by kgalazka:
URL:
https://cgit.FreeBSD.org/src/commit/?id=7ffe1a1f6318bb0116900114950114e5f81418fd
commit 7ffe1a1f6318bb0116900114950114e5f81418fd
Author: Krzysztof Galazka <kgala...@freebsd.org>
AuthorDate: 2025-06-17 19:17:02 +0000
Commit: Krzysztof Galazka <kgala...@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.gala...@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);
