mirror of https://gitee.com/openkylin/linux.git
i40e: check multi-bit state correctly
The hash is reported correctly in the rss field if and only if the filter status is 3. Other values of filter status mean different things and we shouldn't depend on a bitwise result. The issue was that a & b --> returns true for b={1,2,3} the fix is a & b == b Also refactor this function to use constant operations because we are in fast path. Change-Id: I4e29be87439c1cf8b60bc31bea29dff89596c013 Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
parent
dcf8f55b15
commit
8a49492008
|
@ -891,13 +891,15 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi,
|
|||
static inline u32 i40e_rx_hash(struct i40e_ring *ring,
|
||||
union i40e_rx_desc *rx_desc)
|
||||
{
|
||||
if (ring->netdev->features & NETIF_F_RXHASH) {
|
||||
if ((le64_to_cpu(rx_desc->wb.qword1.status_error_len) >>
|
||||
I40E_RX_DESC_STATUS_FLTSTAT_SHIFT) &
|
||||
I40E_RX_DESC_FLTSTAT_RSS_HASH)
|
||||
return le32_to_cpu(rx_desc->wb.qword0.hi_dword.rss);
|
||||
}
|
||||
return 0;
|
||||
const __le64 rss_mask =
|
||||
cpu_to_le64((u64)I40E_RX_DESC_FLTSTAT_RSS_HASH <<
|
||||
I40E_RX_DESC_STATUS_FLTSTAT_SHIFT);
|
||||
|
||||
if ((ring->netdev->features & NETIF_F_RXHASH) &&
|
||||
(rx_desc->wb.qword1.status_error_len & rss_mask) == rss_mask)
|
||||
return le32_to_cpu(rx_desc->wb.qword0.hi_dword.rss);
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
Loading…
Reference in New Issue