From: Brett Creeley <brett.creeley@intel.com>
Date: Wed, 26 Jun 2019 02:20:23 -0700
Subject: ice: Remove duplicate code in ice_alloc_rx_bufs
Patch-mainline: v5.4-rc1
Git-commit: a1e9968593234c179fcb3e71875897ae585c8362
References: jsc#SLE-7926
Currently if the call to ice_alloc_mapped_page() fails we jump to the
no_buf label, possibly call ice_release_rx_desc(), and return true
indicating that there is more work to do. In the success case we just
fall out of the while loop, possibly call ice_alloc_mapped_page(), and
return false saying we exhausted cleaned_count. This flow can be
improved by breaking if ice_alloc_mapped_page() fails and then the flow
outside of the while loop is the same for the failure and success case.
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/ice/ice_txrx.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -478,8 +478,9 @@ bool ice_alloc_rx_bufs(struct ice_ring *
bi = &rx_ring->rx_buf[ntu];
do {
+ /* if we fail here, we have work remaining */
if (!ice_alloc_mapped_page(rx_ring, bi))
- goto no_bufs;
+ break;
/* sync the buffer for use by the device */
dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
@@ -510,16 +511,7 @@ bool ice_alloc_rx_bufs(struct ice_ring *
if (rx_ring->next_to_use != ntu)
ice_release_rx_desc(rx_ring, ntu);
- return false;
-
-no_bufs:
- if (rx_ring->next_to_use != ntu)
- ice_release_rx_desc(rx_ring, ntu);
-
- /* make sure to come back via polling to try again after
- * allocation failure
- */
- return true;
+ return !!cleaned_count;
}
/**