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Date: Mon, 20 Sep 2021 18:40:24 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Prabhakar Kushwaha <pkushwaha@...vell.com>, Ariel Elior <aelior@...vell.com>, Shai Malin <smalin@...vell.com>, "David S. Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.14 003/217] qed: Fix the VF msix vectors flow From: Shai Malin <smalin@...vell.com> [ 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@...vell.com> Signed-off-by: Ariel Elior <aelior@...vell.com> Signed-off-by: Shai Malin <smalin@...vell.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/ethernet/qlogic/qed/qed_main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c index 52e747fd9c83..62d514b60e23 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_main.c +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c @@ -437,7 +437,12 @@ 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; -- 2.30.2
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