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    Subject[PATCH AUTOSEL 4.20 285/304] fsl/fman: Use GFP_ATOMIC in {memac,tgec}_add_hash_mac_address()
    Date
    From: Scott Wood <oss@buserror.net>

    [ Upstream commit 0d9c9a238faf925823bde866182c663b6d734f2e ]

    These functions are called from atomic context:

    [ 9.150239] BUG: sleeping function called from invalid context at /home/scott/git/linux/mm/slab.h:421
    [ 9.158159] in_atomic(): 1, irqs_disabled(): 0, pid: 4432, name: ip
    [ 9.163128] CPU: 8 PID: 4432 Comm: ip Not tainted 4.20.0-rc2-00169-g63d86876f324 #29
    [ 9.163130] Call Trace:
    [ 9.170701] [c0000002e899a980] [c0000000009c1068] .dump_stack+0xa8/0xec (unreliable)
    [ 9.177140] [c0000002e899aa10] [c00000000007a7b4] .___might_sleep+0x138/0x164
    [ 9.184440] [c0000002e899aa80] [c0000000001d5bac] .kmem_cache_alloc_trace+0x238/0x30c
    [ 9.191216] [c0000002e899ab40] [c00000000065ea1c] .memac_add_hash_mac_address+0x104/0x198
    [ 9.199464] [c0000002e899abd0] [c00000000065a788] .set_multi+0x1c8/0x218
    [ 9.206242] [c0000002e899ac80] [c0000000006615ec] .dpaa_set_rx_mode+0xdc/0x17c
    [ 9.213544] [c0000002e899ad00] [c00000000083d2b0] .__dev_set_rx_mode+0x80/0xd4
    [ 9.219535] [c0000002e899ad90] [c00000000083d334] .dev_set_rx_mode+0x30/0x54
    [ 9.225271] [c0000002e899ae10] [c00000000083d4a0] .__dev_open+0x148/0x1c8
    [ 9.230751] [c0000002e899aeb0] [c00000000083d934] .__dev_change_flags+0x19c/0x1e0
    [ 9.230755] [c0000002e899af60] [c00000000083d9a4] .dev_change_flags+0x2c/0x80
    [ 9.242752] [c0000002e899aff0] [c0000000008554ec] .do_setlink+0x350/0xf08
    [ 9.248228] [c0000002e899b170] [c000000000857ad0] .rtnl_newlink+0x588/0x7e0
    [ 9.253965] [c0000002e899b740] [c000000000852424] .rtnetlink_rcv_msg+0x3e0/0x498
    [ 9.261440] [c0000002e899b820] [c000000000884790] .netlink_rcv_skb+0x134/0x14c
    [ 9.267607] [c0000002e899b8e0] [c000000000851840] .rtnetlink_rcv+0x18/0x2c
    [ 9.274558] [c0000002e899b950] [c000000000883c8c] .netlink_unicast+0x214/0x318
    [ 9.281163] [c0000002e899ba00] [c000000000884220] .netlink_sendmsg+0x348/0x444
    [ 9.287076] [c0000002e899bae0] [c00000000080d13c] .sock_sendmsg+0x2c/0x54
    [ 9.287080] [c0000002e899bb50] [c0000000008106c0] .___sys_sendmsg+0x2d0/0x2d8
    [ 9.298375] [c0000002e899bd30] [c000000000811a80] .__sys_sendmsg+0x5c/0xb0
    [ 9.303939] [c0000002e899be20] [c0000000000006b0] system_call+0x60/0x6c

    Signed-off-by: Scott Wood <oss@buserror.net>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/freescale/fman/fman_memac.c | 2 +-
    drivers/net/ethernet/freescale/fman/fman_tgec.c | 2 +-
    2 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/drivers/net/ethernet/freescale/fman/fman_memac.c b/drivers/net/ethernet/freescale/fman/fman_memac.c
    index bc6eb30aa20f..41c6fa200e74 100644
    --- a/drivers/net/ethernet/freescale/fman/fman_memac.c
    +++ b/drivers/net/ethernet/freescale/fman/fman_memac.c
    @@ -928,7 +928,7 @@ int memac_add_hash_mac_address(struct fman_mac *memac, enet_addr_t *eth_addr)
    hash = get_mac_addr_hash_code(addr) & HASH_CTRL_ADDR_MASK;

    /* Create element to be added to the driver hash table */
    - hash_entry = kmalloc(sizeof(*hash_entry), GFP_KERNEL);
    + hash_entry = kmalloc(sizeof(*hash_entry), GFP_ATOMIC);
    if (!hash_entry)
    return -ENOMEM;
    hash_entry->addr = addr;
    diff --git a/drivers/net/ethernet/freescale/fman/fman_tgec.c b/drivers/net/ethernet/freescale/fman/fman_tgec.c
    index 40705938eecc..f75b9c11b2d2 100644
    --- a/drivers/net/ethernet/freescale/fman/fman_tgec.c
    +++ b/drivers/net/ethernet/freescale/fman/fman_tgec.c
    @@ -553,7 +553,7 @@ int tgec_add_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
    hash = (crc >> TGEC_HASH_MCAST_SHIFT) & TGEC_HASH_ADR_MSK;

    /* Create element to be added to the driver hash table */
    - hash_entry = kmalloc(sizeof(*hash_entry), GFP_KERNEL);
    + hash_entry = kmalloc(sizeof(*hash_entry), GFP_ATOMIC);
    if (!hash_entry)
    return -ENOMEM;
    hash_entry->addr = addr;
    --
    2.19.1
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