mtd: spi-nor: cadence-quadspi: Fix error path on failure to acquire reset lines

Make sure to undo the prior changes done by the driver when exiting due
to failure to acquire reset lines.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-5-vigneshr@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/mtd/spi-nor/controllers/cadence-quadspi.c

@@ -1359,13 +1359,13 @@ static int cqspi_probe(struct platform_device *pdev)
 	rstc = devm_reset_control_get_optional_exclusive(dev, "qspi");
 	if (IS_ERR(rstc)) {
 		dev_err(dev, "Cannot get QSPI reset.\n");
-		return PTR_ERR(rstc);
+		goto probe_reset_failed;
 	}
 
 	rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
 	if (IS_ERR(rstc_ocp)) {
 		dev_err(dev, "Cannot get QSPI OCP reset.\n");
-		return PTR_ERR(rstc_ocp);
+		goto probe_reset_failed;
 	}
 
 	reset_control_assert(rstc);
@@ -1384,7 +1384,7 @@ static int cqspi_probe(struct platform_device *pdev)
 			       pdev->name, cqspi);
 	if (ret) {
 		dev_err(dev, "Cannot request IRQ.\n");
-		goto probe_irq_failed;
+		goto probe_reset_failed;
 	}
 
 	cqspi_wait_idle(cqspi);
@@ -1401,7 +1401,7 @@ static int cqspi_probe(struct platform_device *pdev)
 	return ret;
 probe_setup_failed:
 	cqspi_controller_enable(cqspi, 0);
-probe_irq_failed:
+probe_reset_failed:
 	clk_disable_unprepare(cqspi->clk);
 probe_clk_failed:
 	pm_runtime_put_sync(dev);