Author: mw
Date: Thu May 30 13:22:12 2019
New Revision: 348397
URL: https://svnweb.freebsd.org/changeset/base/348397
Log:
Check for number of MSI-x upon partial allocation in ENA
The ENA driver needs at least 2 MSI-x - one for admin queue, and one for
IO queues pair. If there were not enough resources to allocate more than
one MSI-x, the device should not be attached.
Submitted by: Michal Krawczyk <m...@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Modified:
head/sys/dev/ena/ena.c
Modified: head/sys/dev/ena/ena.c
==============================================================================
--- head/sys/dev/ena/ena.c Thu May 30 13:20:42 2019 (r348396)
+++ head/sys/dev/ena/ena.c Thu May 30 13:22:12 2019 (r348397)
@@ -1865,6 +1865,14 @@ ena_enable_msix(struct ena_adapter *adapter)
}
if (msix_vecs != msix_req) {
+ if (msix_vecs == ENA_ADMIN_MSIX_VEC) {
+ device_printf(dev,
+ "Not enough number of MSI-x allocated: %d\n",
+ msix_vecs);
+ pci_release_msi(dev);
+ rc = ENOSPC;
+ goto err_msix_free;
+ }
device_printf(dev, "Enable only %d MSI-x (out of %d), reduce "
"the number of queues\n", msix_vecs, msix_req);
adapter->num_queues = msix_vecs - ENA_ADMIN_MSIX_VEC;
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