On Thu, Sep 15, 2022 at 02:40:12PM +0200, Fabio M. De Francesco wrote: > Pages allocated with GFP_ATOMIC cannot come from Highmem. This is why > there is no need to call kmap() on them. > > Therefore, don't call kmap() on rx_buffer->page() and instead use a > plain page_address() to get the kernel address. > > Suggested-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Suggested-by: Alexander Duyck <alexander.duyck@xxxxxxxxx> > Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Reviewed-by: Alexander Duyck <alexander.duyck@xxxxxxxxx> > Tested-by: Gurucharan <gurucharanx.g@xxxxxxxxx> > Signed-off-by: Fabio M. De Francesco <fmdefrancesco@xxxxxxxxx> > --- > > I send again this patch because it was submitted more than two months ago, > Monday 4th July 2022, but for one or more (good?) reasons it has not yet > reached Linus' tree. In the meantime I am also forwarding two "Reviewed-by" > and one "Tested-by" tags (thanks a lot to Ira, Alexander, Gurucharan). > Obviously I have not made any changes to the code. I see this applied by Tony Nguyen in linux-next: 03f51719df03 ixgbe: Don't call kmap() on page allocated with GFP_ATOMIC So I assume it will land in the next merge window? Move Tony to the To line. Ira > > drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c > index 04f453eabef6..cb5c707538a5 100644 > --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c > +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c > @@ -1964,15 +1964,13 @@ static bool ixgbe_check_lbtest_frame(struct ixgbe_rx_buffer *rx_buffer, > > frame_size >>= 1; > > - data = kmap(rx_buffer->page) + rx_buffer->page_offset; > + data = page_address(rx_buffer->page) + rx_buffer->page_offset; > > if (data[3] != 0xFF || > data[frame_size + 10] != 0xBE || > data[frame_size + 12] != 0xAF) > match = false; > > - kunmap(rx_buffer->page); > - > return match; > } > > -- > 2.37.2 >
