From: Stanislaw Gruszka Date: Thu, 14 Mar 2013 11:48:40 +0000 (+0100) Subject: iwl3945: fix length of dma buffers X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7f42ace3118afedbd1848a349d01a11d9ca13d41;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git iwl3945: fix length of dma buffers commit bdb084b22d8aee66c87af5e9c36bd6cf7f3bccfd Author: Stanislaw Gruszka Date: Wed Feb 13 15:49:08 2013 +0100 iwlegacy: more checks for dma mapping errors broke il3945_tx_skb() dma buffer length settings, what results on firmware errors like showed below and make 3945 device non usable. iwl3945 0000:02:00.0: Microcode SW error detected. Restarting 0x82000008. iwl3945 0000:02:00.0: Loaded firmware version: 15.32.2.9 iwl3945 0000:02:00.0: Start IWL Error Log Dump: iwl3945 0000:02:00.0: Status: 0x000202E4, count: 1 iwl3945 0000:02:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line iwl3945 0000:02:00.0: SYSASSERT (0x5) 0000208934 0x008B6 0x0035E 0x00320 0x00000 267 iwl3945 0000:02:00.0: Error Reply type 0x00000001 cmd Reported-by: Zdenek Kabelac Reported-by: Krzysztof Kolasa Reported-by: Pedro Francisco Signed-off-by: Stanislaw Gruszka Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/iwlegacy/3945-mac.c b/drivers/net/wireless/iwlegacy/3945-mac.c index 3630a41df50d..c353b5f19c8c 100644 --- a/drivers/net/wireless/iwlegacy/3945-mac.c +++ b/drivers/net/wireless/iwlegacy/3945-mac.c @@ -475,6 +475,7 @@ il3945_tx_skb(struct il_priv *il, dma_addr_t txcmd_phys; int txq_id = skb_get_queue_mapping(skb); u16 len, idx, hdr_len; + u16 firstlen, secondlen; u8 id; u8 unicast; u8 sta_id; @@ -589,21 +590,22 @@ il3945_tx_skb(struct il_priv *il, len = sizeof(struct il3945_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len; - len = (len + 3) & ~3; + firstlen = (len + 3) & ~3; /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ txcmd_phys = - pci_map_single(il->pci_dev, &out_cmd->hdr, len, PCI_DMA_TODEVICE); + pci_map_single(il->pci_dev, &out_cmd->hdr, firstlen, + PCI_DMA_TODEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, txcmd_phys))) goto drop_unlock; /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ - len = skb->len - hdr_len; - if (len) { + secondlen = skb->len - hdr_len; + if (secondlen > 0) { phys_addr = - pci_map_single(il->pci_dev, skb->data + hdr_len, len, + pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, PCI_DMA_TODEVICE); if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) goto drop_unlock; @@ -611,12 +613,12 @@ il3945_tx_skb(struct il_priv *il, /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ - il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, len, 1, 0); + il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); dma_unmap_addr_set(out_meta, mapping, txcmd_phys); - dma_unmap_len_set(out_meta, len, len); - if (len) - il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, len, 0, - U32_PAD(len)); + dma_unmap_len_set(out_meta, len, firstlen); + if (secondlen > 0) + il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen, 0, + U32_PAD(secondlen)); if (!ieee80211_has_morefrags(hdr->frame_control)) { txq->need_update = 1;