[BUG] discard_granularity is 0 on rk3399-gru-kevin

[Coly Li]

On 2020/9/28 04:29, Vicente Bergas wrote:
> Hi,
> since recently the rk3399-gru-kevin is reporting the trace below.
> The issue has been uncovered by
>  b35fd7422c2f8e04496f5a770bd4e1a205414b3f
>  block: check queue's limits.discard_granularity in
> __blkdev_issue_discard()

Hi Vicente,

Thanks for the information. It seems the device with f2fs declares to
support DISCARD but don't initialize discard_granularity for its queue.

Can I know which block driver is under f2fs ?

Thanks.

Coly Li


> 
> WARNING: CPU: 0 PID: 135 at __blkdev_issue_discard+0x200/0x294
> CPU: 0 PID: 135 Comm: f2fs_discard-17 Not tainted 5.9.0-rc6 #1
> Hardware name: Google Kevin (DT)
> pstate: 00000005 (nzcv daif -PAN -UAO BTYPE=--)
> pc : __blkdev_issue_discard+0x200/0x294
> lr : __blkdev_issue_discard+0x54/0x294
> sp : ffff800011dd3b10
> x29: ffff800011dd3b10 x28: 0000000000000000 x27: ffff800011dd3cc4 x26:
> ffff800011dd3e18 x25: 000000000004e69b x24: 0000000000000c40 x23:
> ffff0000f1deaaf0 x22: ffff0000f2849200 x21: 00000000002734d8 x20:
> 0000000000000008 x19: 0000000000000000 x18: 0000000000000000 x17:
> 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14:
> 0000000000000394 x13: 0000000000000000 x12: 0000000000000000 x11:
> 0000000000000000 x10: 00000000000008b0 x9 : ffff800011dd3cb0 x8 :
> 000000000004e69b x7 : 0000000000000000 x6 : ffff0000f1926400 x5 :
> ffff0000f1940800 x4 : 0000000000000000 x3 : 0000000000000c40 x2 :
> 0000000000000008 x1 : 00000000002734d8 x0 : 0000000000000000 Call trace:
> __blkdev_issue_discard+0x200/0x294
> __submit_discard_cmd+0x128/0x374
> __issue_discard_cmd_orderly+0x188/0x244
> __issue_discard_cmd+0x2e8/0x33c
> issue_discard_thread+0xe8/0x2f0
> kthread+0x11c/0x120
> ret_from_fork+0x10/0x1c
> ---[ end trace e4c8023d33dfe77a ]---
> mmcblk1p2: Error: discard_granularity is 0.
> mmcblk1p2: Error: discard_granularity is 0.
> <last message repeated multiple times>