Commit 50f73f31 authored Aug 22, 2021 by Shai Malin Committed by Greg Kroah-Hartman Sep 12, 2021

qed: Fix the VF msix vectors flow



[ Upstream commit b0cd08537db8d2fbb227cdb2e5835209db295a24 ]

For VFs we should return with an error in case we didn't get the exact
number of msix vectors as we requested.
Not doing that will lead to a crash when starting queues for this VF.

Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: Shai Malin <smalin@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 92abb09f

drivers/net/ethernet/qlogic/qed/qed_main.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -559,7 +559,12 @@ static int qed_enable_msix(struct qed_dev *cdev,
		rc = cnt;
		}

		if (rc > 0) {
		/* For VFs, we should return with an error in case we didn't get the
		* exact number of msix vectors as we requested.
		* Not doing that will lead to a crash when starting queues for
		* this VF.
		*/
		if ((IS_PF(cdev) && rc > 0) \|\| (IS_VF(cdev) && rc == cnt)) {
		/* MSI-x configuration was achieved */
		int_params->out.int_mode = QED_INT_MODE_MSIX;
		int_params->out.num_vectors = rc;