scsi: ufs: core: check asymmetric connected lanes

Performance problems may occur if there is a problem with the asymmetric
connected lane such as h/w failure.  Currently, only check connected
lane for rx/tx is checked if it is not 0.  But it should also be checked
if it is asymmetrically connected.

Signed-off-by: SEO HOYOUNG <[email protected]>
Link: https://lore.kernel.org/r/e82b4b65b5f6501a687c624dd06e5c362e160f32.1728544727.git.hy50.seo@samsung.com
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: SEO HOYOUNG

drivers/ufs/core/ufshcd.c

@@ -4535,6 +4535,14 @@ static int ufshcd_get_max_pwr_mode(struct ufs_hba *hba)
 		return -EINVAL;
 	}
 
+	if (pwr_info->lane_rx != pwr_info->lane_tx) {
+		dev_err(hba->dev, "%s: asymmetric connected lanes. rx=%d, tx=%d\n",
+			__func__,
+				pwr_info->lane_rx,
+				pwr_info->lane_tx);
+		return -EINVAL;
+	}
+
 	/*
 	 * First, get the maximum gears of HS speed.
 	 * If a zero value, it means there is no HSGEAR capability.