diff options
author | Arthur Kiyanovski <akiyano@amazon.com> | 2022-01-02 07:37:28 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-01-02 12:45:13 +0000 |
commit | 5055dc0348b8b7c168e3296044bccd724e1ae6cd (patch) | |
tree | 1acec271fea5784bfbc23b2a5ce393efa5b83a59 /drivers | |
parent | cb3d4f98f0b26eafa0b913ac3716e4714254a747 (diff) | |
download | linux-5055dc0348b8b7c168e3296044bccd724e1ae6cd.tar.bz2 |
net: ena: Fix error handling when calculating max IO queues number
The role of ena_calc_max_io_queue_num() is to return the number
of queues supported by the device, which means the return value
should be >=0.
The function that calls ena_calc_max_io_queue_num(), checks
the return value. If it is 0, it means the device reported
it supports 0 IO queues. This case is considered an error
and is handled by the calling function accordingly.
However the current implementation of ena_calc_max_io_queue_num()
is wrong, since when it detects the device supports 0 IO queues,
it returns -EFAULT.
In such a case the calling function doesn't detect the error,
and therefore doesn't handle it.
This commit changes ena_calc_max_io_queue_num() to return 0
in case the device reported it supports 0 queues, allowing the
calling function to properly handle the error case.
Fixes: 736ce3f414cc ("net: ena: make ethtool -l show correct max number of queues")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/amazon/ena/ena_netdev.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 52a8c60b7e29..c72f0c7ff4aa 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -4026,10 +4026,6 @@ static u32 ena_calc_max_io_queue_num(struct pci_dev *pdev, max_num_io_queues = min_t(u32, max_num_io_queues, io_tx_cq_num); /* 1 IRQ for mgmnt and 1 IRQs for each IO direction */ max_num_io_queues = min_t(u32, max_num_io_queues, pci_msix_vec_count(pdev) - 1); - if (unlikely(!max_num_io_queues)) { - dev_err(&pdev->dev, "The device doesn't have io queues\n"); - return -EFAULT; - } return max_num_io_queues; } |