From: Shai Malin smalin@marvell.com
stable inclusion from linux-4.19.207 commit c1290961f2824a44618d4cb3f0ee5bdb8224bbe3
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[ 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 Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- 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 049a83b40e469..9d77f318d11ed 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_main.c +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c @@ -439,7 +439,12 @@ 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;