During ufs probe, the phy drvdata is read to get
the phy version information. But in some rare cases,
the ufs driver tries to read it before the phy parameters
are fully initialized, which causes kernel panic.
So, defer the ufs probe if phy drvdata is not fully
initialized.
Call trace:
ufs_qcom_phy_save_controller_version+0x4/0x18 [phy_qcom_ufs]
ufshcd_variant_hba_init+0x40/0x98
ufshcd_init+0x388/0xc64
ufshcd_pltfrm_init+0x324/0x42c
ufs_qcom_probe+0x108/0x248 [ufs_qcom]
platform_probe+0xc0/0xec
really_probe+0x190/0x384
__driver_probe_device+0xa0/0x12c
driver_probe_device+0x44/0x210
__driver_attach+0x108/0x1d4
bus_for_each_dev+0x98/0xe8
driver_attach+0x24/0x34
bus_add_driver+0x10c/0x1fc
driver_register+0x78/0x118
__platform_driver_register+0x24/0x34
init_module+0x20/0xfe4 [ufs_qcom]
do_one_initcall+0xdc/0x314
do_init_module+0x48/0x1dc
load_module+0x1348/0x152c
__arm64_sys_finit_module+0xc0/0x110
invoke_syscall+0x58/0x11c
el0_svc_common+0xb4/0xf4
do_el0_svc+0x2c/0xb0
el0_svc+0x2c/0xa4
el0t_64_sync_handler+0x68/0xb4
el0t_64_sync+0x1a4/0x1a8
---[ end trace 0000000000000000 ]---.
Change-Id: Ia5783cdfed68d54a38340ca2234b6273c43b2b06
Signed-off-by: Ram Kumar Dwivedi <quic_rdwivedi@quicinc.com>
b0b23bcbfd