ufs_qcom_dump_dbg_regs() uses usleep_range, a sleeping function, but can
be called from atomic context in the following flow:
ufshcd_intr -> ufshcd_sl_intr -> ufshcd_check_errors ->
ufshcd_print_host_regs -> ufshcd_vops_dbg_register_dump ->
ufs_qcom_dump_dbg_regs
This causes a boot crash on the Lenovo Miix 630 when the interrupt is
handled on the idle thread.
Fix the issue by switching to udelay().
Fixes: 9c46b8676271 ("scsi: ufs-qcom: dump additional testbus registers")
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@xxxxxxxxx>
---
drivers/scsi/ufs/ufs-qcom.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 19aa5c44e0da..f938867301a0 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1658,11 +1658,11 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
/* sleep a bit intermittently as we are dumping too much data */
ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper);
- usleep_range(1000, 1100);
+ udelay(1000);
ufs_qcom_testbus_read(hba);
- usleep_range(1000, 1100);
+ udelay(1000);
ufs_qcom_print_unipro_testbus(hba);
- usleep_range(1000, 1100);
+ udelay(1000);
}
/**
--
2.17.1
