From 61a0f6efc8932e9914e1782ff3a027e23c687fc6 Mon Sep 17 00:00:00 2001 From: Neil Horman Date: Tue, 9 Apr 2013 23:19:00 +0000 Subject: e100: Add dma mapping error check e100 uses pci_map_single, but fails to check for a dma mapping error after its use, resulting in a stack trace: [ 46.656594] ------------[ cut here ]------------ [ 46.657004] WARNING: at lib/dma-debug.c:933 check_unmap+0x47b/0x950() [ 46.657004] Hardware name: To Be Filled By O.E.M. [ 46.657004] e100 0000:00:0e.0: DMA-API: device driver failed to check map error[device address=0x000000007a4540fa] [size=90 bytes] [mapped as single] [ 46.657004] Modules linked in: [ 46.657004] w83627hf hwmon_vid snd_via82xx ppdev snd_ac97_codec ac97_bus snd_seq snd_pcm snd_mpu401 snd_mpu401_uart ns558 snd_rawmidi gameport parport_pc e100 snd_seq_device parport snd_page_alloc snd_timer snd soundcore skge shpchp k8temp mii edac_core i2c_viapro edac_mce_amd nfsd auth_rpcgss nfs_acl lockd sunrpc binfmt_misc uinput ata_generic pata_acpi radeon i2c_algo_bit drm_kms_helper ttm firewire_ohci drm firewire_core pata_via sata_via i2c_core sata_promise crc_itu_t [ 46.657004] Pid: 792, comm: ip Not tainted 3.8.0-0.rc6.git0.1.fc19.x86_64 #1 [ 46.657004] Call Trace: [ 46.657004] [] warn_slowpath_common+0x70/0xa0 [ 46.657004] [] warn_slowpath_fmt+0x4c/0x50 [ 46.657004] [] check_unmap+0x47b/0x950 [ 46.657004] [] debug_dma_unmap_page+0x5f/0x70 [ 46.657004] [] ? e100_tx_clean+0x30/0x210 [e100] [ 46.657004] [] e100_tx_clean+0xe8/0x210 [e100] [ 46.657004] [] e100_poll+0x56f/0x6c0 [e100] [ 46.657004] [] ? net_rx_action+0xa1/0x370 [ 46.657004] [] net_rx_action+0x172/0x370 [ 46.657004] [] __do_softirq+0xef/0x3d0 [ 46.657004] [] call_softirq+0x1c/0x30 [ 46.657004] [] do_softirq+0x85/0xc0 [ 46.657004] [] irq_exit+0xd5/0xe0 [ 46.657004] [] do_IRQ+0x56/0xc0 [ 46.657004] [] common_interrupt+0x72/0x72 [ 46.657004] [] ? _raw_spin_unlock_irqrestore+0x3b/0x70 [ 46.657004] [] __slab_free+0x58/0x38b [ 46.657004] [] ? fsnotify_clear_marks_by_inode+0x34/0x120 [ 46.657004] [] ? kmem_cache_free+0x97/0x320 [ 46.657004] [] ? sock_destroy_inode+0x34/0x40 [ 46.657004] [] ? sock_destroy_inode+0x34/0x40 [ 46.657004] [] kmem_cache_free+0x312/0x320 [ 46.657004] [] sock_destroy_inode+0x34/0x40 [ 46.657004] [] destroy_inode+0x38/0x60 [ 46.657004] [] evict+0x10e/0x1a0 [ 46.657004] [] iput+0xf5/0x180 [ 46.657004] [] dput+0x248/0x310 [ 46.657004] [] __fput+0x171/0x240 [ 46.657004] [] ____fput+0xe/0x10 [ 46.657004] [] task_work_run+0xac/0xe0 [ 46.657004] [] do_exit+0x26d/0xc30 [ 46.657004] [] ? finish_task_switch+0x7c/0x120 [ 46.657004] [] ? retint_swapgs+0x13/0x1b [ 46.657004] [] do_group_exit+0x49/0xc0 [ 46.657004] [] sys_exit_group+0x14/0x20 [ 46.657004] [] system_call_fastpath+0x16/0x1b [ 46.657004] ---[ end trace 4468c44e2156e7d1 ]--- [ 46.657004] Mapped at: [ 46.657004] [] debug_dma_map_page+0x91/0x140 [ 46.657004] [] e100_xmit_prepare+0x12b/0x1c0 [e100] [ 46.657004] [] e100_exec_cb+0x84/0x140 [e100] [ 46.657004] [] e100_xmit_frame+0x3a/0x190 [e100] [ 46.657004] [] dev_hard_start_xmit+0x259/0x6c0 Easy fix, modify the cb paramter to e100_exec_cb to return an error, and do the dma_mapping_error check in the obvious place This was reported previously here: http://article.gmane.org/gmane.linux.network/257893 But nobody stepped up and fixed it. CC: Josh Boyer CC: e1000-devel@lists.sourceforge.net Signed-off-by: Neil Horman Reported-by: Michal Jaegermann Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c index ec800b0..d2bea3f 100644 --- a/drivers/net/ethernet/intel/e100.c +++ b/drivers/net/ethernet/intel/e100.c @@ -870,7 +870,7 @@ err_unlock: } static int e100_exec_cb(struct nic *nic, struct sk_buff *skb, - void (*cb_prepare)(struct nic *, struct cb *, struct sk_buff *)) + int (*cb_prepare)(struct nic *, struct cb *, struct sk_buff *)) { struct cb *cb; unsigned long flags; @@ -888,10 +888,13 @@ static int e100_exec_cb(struct nic *nic, struct sk_buff *skb, nic->cbs_avail--; cb->skb = skb; + err = cb_prepare(nic, cb, skb); + if (err) + goto err_unlock; + if (unlikely(!nic->cbs_avail)) err = -ENOSPC; - cb_prepare(nic, cb, skb); /* Order is important otherwise we'll be in a race with h/w: * set S-bit in current first, then clear S-bit in previous. */ @@ -1091,7 +1094,7 @@ static void e100_get_defaults(struct nic *nic) nic->mii.mdio_write = mdio_write; } -static void e100_configure(struct nic *nic, struct cb *cb, struct sk_buff *skb) +static int e100_configure(struct nic *nic, struct cb *cb, struct sk_buff *skb) { struct config *config = &cb->u.config; u8 *c = (u8 *)config; @@ -1181,6 +1184,7 @@ static void e100_configure(struct nic *nic, struct cb *cb, struct sk_buff *skb) netif_printk(nic, hw, KERN_DEBUG, nic->netdev, "[16-23]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n", c[16], c[17], c[18], c[19], c[20], c[21], c[22], c[23]); + return 0; } /************************************************************************* @@ -1331,7 +1335,7 @@ static const struct firmware *e100_request_firmware(struct nic *nic) return fw; } -static void e100_setup_ucode(struct nic *nic, struct cb *cb, +static int e100_setup_ucode(struct nic *nic, struct cb *cb, struct sk_buff *skb) { const struct firmware *fw = (void *)skb; @@ -1358,6 +1362,7 @@ static void e100_setup_ucode(struct nic *nic, struct cb *cb, cb->u.ucode[min_size] |= cpu_to_le32((BUNDLESMALL) ? 0xFFFF : 0xFF80); cb->command = cpu_to_le16(cb_ucode | cb_el); + return 0; } static inline int e100_load_ucode_wait(struct nic *nic) @@ -1400,18 +1405,20 @@ static inline int e100_load_ucode_wait(struct nic *nic) return err; } -static void e100_setup_iaaddr(struct nic *nic, struct cb *cb, +static int e100_setup_iaaddr(struct nic *nic, struct cb *cb, struct sk_buff *skb) { cb->command = cpu_to_le16(cb_iaaddr); memcpy(cb->u.iaaddr, nic->netdev->dev_addr, ETH_ALEN); + return 0; } -static void e100_dump(struct nic *nic, struct cb *cb, struct sk_buff *skb) +static int e100_dump(struct nic *nic, struct cb *cb, struct sk_buff *skb) { cb->command = cpu_to_le16(cb_dump); cb->u.dump_buffer_addr = cpu_to_le32(nic->dma_addr + offsetof(struct mem, dump_buf)); + return 0; } static int e100_phy_check_without_mii(struct nic *nic) @@ -1581,7 +1588,7 @@ static int e100_hw_init(struct nic *nic) return 0; } -static void e100_multi(struct nic *nic, struct cb *cb, struct sk_buff *skb) +static int e100_multi(struct nic *nic, struct cb *cb, struct sk_buff *skb) { struct net_device *netdev = nic->netdev; struct netdev_hw_addr *ha; @@ -1596,6 +1603,7 @@ static void e100_multi(struct nic *nic, struct cb *cb, struct sk_buff *skb) memcpy(&cb->u.multi.addr[i++ * ETH_ALEN], &ha->addr, ETH_ALEN); } + return 0; } static void e100_set_multicast_list(struct net_device *netdev) @@ -1756,11 +1764,18 @@ static void e100_watchdog(unsigned long data) round_jiffies(jiffies + E100_WATCHDOG_PERIOD)); } -static void e100_xmit_prepare(struct nic *nic, struct cb *cb, +static int e100_xmit_prepare(struct nic *nic, struct cb *cb, struct sk_buff *skb) { + dma_addr_t dma_addr; cb->command = nic->tx_command; + dma_addr = pci_map_single(nic->pdev, + skb->data, skb->len, PCI_DMA_TODEVICE); + /* If we can't map the skb, have the upper layer try later */ + if (pci_dma_mapping_error(nic->pdev, dma_addr)) + return -ENOMEM; + /* * Use the last 4 bytes of the SKB payload packet as the CRC, used for * testing, ie sending frames with bad CRC. @@ -1777,11 +1792,10 @@ static void e100_xmit_prepare(struct nic *nic, struct cb *cb, cb->u.tcb.tcb_byte_count = 0; cb->u.tcb.threshold = nic->tx_threshold; cb->u.tcb.tbd_count = 1; - cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev, - skb->data, skb->len, PCI_DMA_TODEVICE)); - /* check for mapping failure? */ + cb->u.tcb.tbd.buf_addr = cpu_to_le32(dma_addr); cb->u.tcb.tbd.size = cpu_to_le16(skb->len); skb_tx_timestamp(skb); + return 0; } static netdev_tx_t e100_xmit_frame(struct sk_buff *skb, -- cgit v0.10.2