scsi: ufs: ufs-qcom: Check host controller state

Commit 52a5180 ("scsi: ufs: core: Fix missing clk change notification
on host reset") added UFS clock scaling notification to
ufshcd_host_reset_and_restore(). This invokes hibern8 enter and exit on
Qualcomm platform which fails because controller is in reset state.

Fix this by checking the Host controller state before sending hibern8
command.

__ufshcd_wl_resume()
ufshcd_reset_and_restore()
ufshcd_host_reset_and_restore()
ufshcd_scale_clks()
ufshcd_vops_clk_scale_notify()
ufs_qcom_clk_scale_notify()
ufshcd_uic_hibern8_enter()

Fixes: 52a5180 ("scsi: ufs: core: Fix missing clk change notification on host reset")
Co-developed-by: Manish Pandey <[email protected]>
Signed-off-by: Manish Pandey <[email protected]>
Signed-off-by: Nitin Rawat <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Manivannan Sadhasivam <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Nitin Rawat

drivers/ufs/host/ufs-qcom.c

@@ -1382,6 +1382,10 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
 	struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params;
 	int err = 0;
 
+	/* check the host controller state before sending hibern8 cmd */
+	if (!ufshcd_is_hba_active(hba))
+		return 0;
+
 	if (status == PRE_CHANGE) {
 		err = ufshcd_uic_hibern8_enter(hba);
 		if (err)