diff options
| author |   Anirudh Venkataramanan <anirudh.venkataramanan@intel.com> | 2022-09-19 11:09:48 -0700 |
|---|---|---|
| committer |   Tony Nguyen <anthony.l.nguyen@intel.com> | 2022-11-02 11:09:13 -0700 |
| commit | 3e7b52e0eb9ef7e67c26072cb1c7a49a5cc356f5 (patch) | |
| tree | ef2187ebb4275bec555ee3c1d6d5eb3df5eaa969 /drivers/net/ethernet/intel/e1000/e1000_main.c | |
| parent | e1000e: Remove unnecessary use of kmap_atomic() (diff) | |
| download | linux-3e7b52e0eb9ef7e67c26072cb1c7a49a5cc356f5.tar.xz linux-3e7b52e0eb9ef7e67c26072cb1c7a49a5cc356f5.zip | |
e1000: Remove unnecessary use of kmap_atomic()
buffer_info->rxbuf.page accessed in e1000_clean_jumbo_rx_irq() is
allocated using GFP_ATOMIC. Pages allocated with GFP_ATOMIC can't come from
highmem and so there's no need to kmap() them. Just use page_address().
I don't have access to a 32-bit system so did some limited testing on
qemu (qemu-system-i386 -m 4096 -smp 4 -device e1000e) with a 32-bit
Debian 11.04 image.
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
Suggested-by: Ira Weiny <ira.weiny@intel.com>
Suggested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000/e1000_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000/e1000_main.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 61e60e4de600..da6e303ad99b 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -4229,8 +4229,6 @@ process_skb: */ p = buffer_info->rxbuf.page; if (length <= copybreak) { - u8 *vaddr; - if (likely(!(netdev->features & NETIF_F_RXFCS))) length -= 4; skb = e1000_alloc_rx_skb(adapter, @@ -4238,10 +4236,9 @@ process_skb: if (!skb) break; - vaddr = kmap_atomic(p); - memcpy(skb_tail_pointer(skb), vaddr, - length); - kunmap_atomic(vaddr); + memcpy(skb_tail_pointer(skb), + page_address(p), length); + /* re-use the page, so don't erase * buffer_info->rxbuf.page */ |