diff options
| author | Jakub Kicinski <[email protected]> | 2020-08-26 12:40:07 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2020-08-26 16:16:39 -0700 |
| commit | 96ecdcc992eb7f468b2cf829b0f5408a1fad4668 (patch) | |
| tree | 212b4bc9439e21c34da2ad7984be27c7be44a7bd /drivers/usb/cdns3/cdns3-trace.h | |
| parent | 96e97bc07e90f175a8980a22827faf702ca4cb30 (diff) | |
bnxt: don't enable NAPI until rings are ready
Netpoll can try to poll napi as soon as napi_enable() is called.
It crashes trying to access a doorbell which is still NULL:
BUG: kernel NULL pointer dereference, address: 0000000000000000
CPU: 59 PID: 6039 Comm: ethtool Kdump: loaded Tainted: G S 5.9.0-rc1-00469-g5fd99b5d9950-dirty #26
RIP: 0010:bnxt_poll+0x121/0x1c0
Code: c4 20 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 8b 86 a0 01 00 00 41 23 85 18 01 00 00 49 8b 96 a8 01 00 00 0d 00 00 00 24 <89> 02
41 f6 45 77 02 74 cb 49 8b ae d8 01 00 00 31 c0 c7 44 24 1a
netpoll_poll_dev+0xbd/0x1a0
__netpoll_send_skb+0x1b2/0x210
netpoll_send_udp+0x2c9/0x406
write_ext_msg+0x1d7/0x1f0
console_unlock+0x23c/0x520
vprintk_emit+0xe0/0x1d0
printk+0x58/0x6f
x86_vector_activate.cold+0xf/0x46
__irq_domain_activate_irq+0x50/0x80
__irq_domain_activate_irq+0x32/0x80
__irq_domain_activate_irq+0x32/0x80
irq_domain_activate_irq+0x25/0x40
__setup_irq+0x2d2/0x700
request_threaded_irq+0xfb/0x160
__bnxt_open_nic+0x3b1/0x750
bnxt_open_nic+0x19/0x30
ethtool_set_channels+0x1ac/0x220
dev_ethtool+0x11ba/0x2240
dev_ioctl+0x1cf/0x390
sock_do_ioctl+0x95/0x130
Reported-by: Rob Sherwood <[email protected]>
Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Jakub Kicinski <[email protected]>
Reviewed-by: Michael Chan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-trace.h')
0 files changed, 0 insertions, 0 deletions