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Message-Id: <3edb8c30e72c429aaa50d3ba43b46e7579b0da63.1677377639.git.geoff@infradead.org> Date: Sun, 26 Feb 2023 02:25:43 +0000 From: Geoff Levand <geoff@...radead.org> To: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>, Alexander Lobakin <alexandr.lobakin@...el.com>, Alexander Duyck <alexander.duyck@...il.com>, Paolo Abeni <pabeni@...hat.com> Subject: [PATCH net v6 2/2] net/ps3_gelic_net: Use dma_mapping_error The current Gelic Etherenet driver was checking the return value of its dma_map_single call, and not using the dma_mapping_error() routine. Fixes runtime problems like these: DMA-API: ps3_gelic_driver sb_05: device driver failed to check map error WARNING: CPU: 0 PID: 0 at kernel/dma/debug.c:1027 .check_unmap+0x888/0x8dc Fixes: 02c1889166b4 ("ps3: gigabit ethernet driver for PS3, take3") Signed-off-by: Geoff Levand <geoff@...radead.org> --- drivers/net/ethernet/toshiba/ps3_gelic_net.c | 37 ++++++++++---------- 1 file changed, 19 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_net.c b/drivers/net/ethernet/toshiba/ps3_gelic_net.c index 7e12e041acd3..2f7505609447 100644 --- a/drivers/net/ethernet/toshiba/ps3_gelic_net.c +++ b/drivers/net/ethernet/toshiba/ps3_gelic_net.c @@ -309,23 +309,31 @@ static int gelic_card_init_chain(struct gelic_card *card, struct gelic_descr_chain *chain, struct gelic_descr *start_descr, int no) { - int i; + struct device *dev = ctodev(card); struct gelic_descr *descr; + int i; - descr = start_descr; - memset(descr, 0, sizeof(*descr) * no); + memset(start_descr, 0, no * sizeof(*start_descr)); /* set up the hardware pointers in each descriptor */ - for (i = 0; i < no; i++, descr++) { + for (i = 0, descr = start_descr; i < no; i++, descr++) { gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE); descr->bus_addr = dma_map_single(ctodev(card), descr, GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL); - if (!descr->bus_addr) - goto iommu_error; + if (dma_mapping_error(dev, descr->bus_addr)) { + dev_err_once(dev, "%s:%d: dma_mapping_error\n", + __func__, __LINE__); + for (i--, descr--; i >= 0; i--, descr--) { + dma_unmap_single(ctodev(card), descr->bus_addr, + GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL); + } + return -ENOMEM; + } + descr->next = descr + 1; descr->prev = descr - 1; } @@ -346,14 +354,6 @@ static int gelic_card_init_chain(struct gelic_card *card, (descr - 1)->next_descr_addr = 0; return 0; - -iommu_error: - for (i--, descr--; 0 <= i; i--, descr--) - if (descr->bus_addr) - dma_unmap_single(ctodev(card), descr->bus_addr, - GELIC_DESCR_SIZE, - DMA_BIDIRECTIONAL); - return -ENOMEM; } /** @@ -407,7 +407,7 @@ static int gelic_descr_prepare_rx(struct gelic_card *card, descr->buf_addr = cpu_to_be32(dma_map_single(dev, napi_buff, GELIC_NET_MAX_MTU, DMA_FROM_DEVICE)); - if (!descr->buf_addr) { + if (dma_mapping_error(dev, descr->buf_addr)) { skb_free_frag(napi_buff); descr->skb = NULL; descr->buf_addr = 0; @@ -773,6 +773,7 @@ static int gelic_descr_prepare_tx(struct gelic_card *card, struct gelic_descr *descr, struct sk_buff *skb) { + struct device *dev = ctodev(card); dma_addr_t buf; if (card->vlan_required) { @@ -787,10 +788,10 @@ static int gelic_descr_prepare_tx(struct gelic_card *card, skb = skb_tmp; } - buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE); + buf = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); - if (!buf) { - dev_err(ctodev(card), + if (dma_mapping_error(dev, buf)) { + dev_err_once(dev, "dma map 2 failed (%p, %i). Dropping packet\n", skb->data, skb->len); return -ENOMEM; -- 2.34.1
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