> Subject: [PATCH] ahci: imx: i.MX8QM: fix error handling
Ping..
Thanks,
Peng.
>
> From: Peng Fan <peng.fan@xxxxxxx>
>
> When imx8_sata_enable failed, need to jump to path disable_clk.
> Otherwise there will be kernel dump as following.
> Workqueue: events deferred_probe_work_func
> pstate: 60000005 (nZCv daif -PAN -UAO)
> pc : _regulator_put.part.27+0x34/0x158
> lr : _regulator_put.part.27+0x2c/0x158
> sp : ffff80001286bb00
> x29: ffff80001286bb00 x28: 0000000000000000
> x27: 0000000000000000 x26: ffff8000100fddf0
> x25: 0000000000000000 x24: 000000000000001b
> x23: ffff80001286bbd8 x22: ffff0008ea007600
> x21: ffff0008ea0104f0 x20: ffff0008ea007e00
> x19: ffff8000120753e8 x18: 0000000000000010
> x17: 00000000eefd8a54 x16: 00000000deadbeef
> x15: ffffffffffffffff x14: ffff800011f198c8
> x13: 0000000000000000 x12: 0000000000000001
> x11: 0000000000000000 x10: 0000000000000990
> x9 : ffff80001286b870 x8 : ffff0008eb99c0f0
> x7 : ffff0008eb99b880 x6 : ffff0008eb99b7c0
> x5 : 00000000000001df x4 : 0000000000001adb
> x3 : ffff8008de089000 x2 : a4c383a3cc862400
> x1 : 0000000000000000 x0 : 0000000000000001
> Call trace:
> _regulator_put.part.27+0x34/0x158
> regulator_put+0x34/0x48
> ahci_platform_put_resources+0x64/0xd0
> release_nodes+0x1b0/0x220
> devres_release_all+0x34/0x50
> really_probe+0x1b8/0x308
> driver_probe_device+0x54/0xe8
> __device_attach_driver+0x80/0xb8
> bus_for_each_drv+0x78/0xc8
> __device_attach+0xd4/0x130
> device_initial_probe+0x10/0x18
> bus_probe_device+0x90/0x98
> deferred_probe_work_func+0x64/0x98
> process_one_work+0x1e0/0x358
> worker_thread+0x208/0x488
> kthread+0x118/0x120
> ret_from_fork+0x10/0x18
>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
> drivers/ata/ahci_imx.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index
> bfc617cc8ac5..1d6a5ef78259 100644
> --- a/drivers/ata/ahci_imx.c
> +++ b/drivers/ata/ahci_imx.c
> @@ -692,6 +692,8 @@ static int imx_sata_enable(struct ahci_host_priv
> *hpriv)
> }
> } else if (imxpriv->type == AHCI_IMX8QM) {
> ret = imx8_sata_enable(hpriv);
> + if (ret)
> + goto disable_clk;
> }
>
> usleep_range(1000, 2000);
> --
> 2.16.4
