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Commit 0b6b69d5 authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan
Browse files

scsi: ufs: Crash the system on unrecoverable state 



If we have hit fatal errors and are not able to recover using
a reset, crash the system instead of proceeding and causing
further system failures.

Change-Id: I01820e4e8d3d3b603f16b615ae475095c3a417dd
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent cc915a39

drivers/scsi/ufs/ufshcd.c

+13 −2
Original line number Diff line number Diff line
@@ -4067,8 +4067,11 @@ int ufshcd_uic_hibern8_enter(struct ufs_hba *hba) 


	for (retries = UIC_HIBERN8_ENTER_RETRIES; retries > 0; retries--) {

		ret = __ufshcd_uic_hibern8_enter(hba);

		if (!ret || ret == -ENOLINK)

		if (!ret)

			goto out;

		/* Unable to recover the link, so no point proceeding */

		 if (ret == -ENOLINK)

			BUG();

	}

out:

	return ret;
@@ -4089,7 +4092,9 @@ int ufshcd_uic_hibern8_exit(struct ufs_hba *hba) 
		ufshcd_update_error_stats(hba, UFS_ERR_HIBERN8_EXIT);

		dev_err(hba->dev, "%s: hibern8 exit failed. ret = %d",

			__func__, ret);

		ret = ufshcd_link_recovery(hba);

		/* Unable to recover the link, so no point proceeding */

		if (ufshcd_link_recovery(hba))

			BUG();

	} else {

		dev_dbg(hba->dev, "%s: Hibern8 Exit at %lld us", __func__,

			ktime_to_us(ktime_get()));
@@ -6315,6 +6320,12 @@ static int ufshcd_reset_and_restore(struct ufs_hba *hba) 
		err = ufshcd_host_reset_and_restore(hba);

	} while (err && --retries);



	/*

	 * There is no point proceeding even after failing

	 * to recover after multiple retries.

	 */

	if (err)

		BUG();

	/*

	 * After reset the door-bell might be cleared, complete

	 * outstanding requests in s/w here.