[PATCH 4/6] drivers: remove unnecessary use of list iterator variable
From: Jakob Koschel <hidden>
Date: 2022-02-28 11:09:09
Also in:
alsa-devel, amd-gfx, dmaengine, dri-devel, intel-gfx, intel-wired-lan, kvm, linux-arch, linux-aspeed, linux-block, linux-cifs, linux-crypto, linux-f2fs-devel, linux-fsdevel, linux-iio, linux-media, linux-mediatek, linux-pm, linux-rdma, linux-scsi, linux-staging, linux-tegra, linux-usb, linux-wireless, linuxppc-dev, lkml, nouveau
Subsystem:
atheros ath generic utilities, atheros ath6kl wireless driver, designware edma core ip driver, dma generic offload engine subsystem, intel ethernet drivers, networking drivers, the rest · Maintainers:
Jeff Johnson, Manivannan Sadhasivam, Vinod Koul, Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
When list_for_each_entry() completes the iteration over the whole list without breaking the loop, the iterator value will *always* be a bogus pointer computed based on the head element. To avoid type confusion use the actual list head directly instead of last iterator value. Signed-off-by: Jakob Koschel <redacted> --- drivers/dma/dw-edma/dw-edma-core.c | 4 ++-- drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 3 ++- drivers/net/wireless/ath/ath6kl/htc_mbox.c | 2 +- 3 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 468d1097a1ec..7883c4831857 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c@@ -136,7 +136,7 @@ static void dw_edma_free_burst(struct dw_edma_chunk *chunk) } /* Remove the list head */ - kfree(child); + kfree(chunk->burst); chunk->burst = NULL; }
@@ -156,7 +156,7 @@ static void dw_edma_free_chunk(struct dw_edma_desc *desc) } /* Remove the list head */ - kfree(child); + kfree(desc->chunk); desc->chunk = NULL; }
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 091f36adbbe1..c0ea9dbc4ff6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c@@ -3963,7 +3963,8 @@ static void __i40e_reprogram_flex_pit(struct i40e_pf *pf, * correctly, the hardware will disable flexible field parsing. */ if (!list_empty(flex_pit_list)) - last_offset = list_prev_entry(entry, list)->src_offset + 1; + last_offset = list_entry(flex_pit_list->prev, + struct i40e_flex_pit, list)->src_offset + 1; for (; i < 3; i++, last_offset++) { i40e_write_rx_ctl(&pf->hw,
diff --git a/drivers/net/wireless/ath/ath6kl/htc_mbox.c b/drivers/net/wireless/ath/ath6kl/htc_mbox.c
index e3874421c4c0..cf5b05860799 100644
--- a/drivers/net/wireless/ath/ath6kl/htc_mbox.c
+++ b/drivers/net/wireless/ath/ath6kl/htc_mbox.c@@ -104,7 +104,7 @@ static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, * it use list_for_each_entry_reverse to walk around the whole ep list. * Therefore assign this lowestpri_ep_dist after walk around the ep_list */ - cred_info->lowestpri_ep_dist = cur_ep_dist->list; + cred_info->lowestpri_ep_dist = *ep_list; WARN_ON(cred_info->cur_free_credits <= 0); --
2.25.1