[PATCH] qed: Fix the VF msix vectors flow

[PATCH] qed: Fix the VF msix vectors flow

[Shai Malin]

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>
---
 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 6871d892eabf..15ef59aa34ff 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -615,7 +615,12 @@ 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;
-- 
2.22.0

Re: [PATCH] qed: Fix the VF msix vectors flow

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Sun, 22 Aug 2021 22:21:14 +0300 you wrote:
> 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>
> 
> [...]

Here is the summary with links:
  - qed: Fix the VF msix vectors flow
    https://git.kernel.org/netdev/net/c/b0cd08537db8

You are awesome, thank you!
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