[PATCH v2 09/14] mtd: nand: sunxi: simplify optional reset handling

Philipp Zabel
2017-03-15T11:32:12Z

As of commit bb475230b8e5 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.

This allows to return errors from devm_reset_control_get_optional and to
call reset_control_(de)assert unconditionally.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/mtd/nand/sunxi_nand.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index 0eeeb8b889ea8..9afc182cbd4e8 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -2212,16 +2212,15 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
goto out_ahb_clk_unprepare;

nfc->reset = devm_reset_control_get_optional(dev, "ahb");
- if (!IS_ERR(nfc->reset)) {
- ret = reset_control_deassert(nfc->reset);
- if (ret) {
- dev_err(dev, "reset err %d\n", ret);
- goto out_mod_clk_unprepare;
- }
- } else if (PTR_ERR(nfc->reset) != -ENOENT) {
+ if (IS_ERR(nfc->reset)) {
ret = PTR_ERR(nfc->reset);
goto out_mod_clk_unprepare;
}
+ ret = reset_control_deassert(nfc->reset);
+ if (ret) {
+ dev_err(dev, "reset err %d\n", ret);
+ goto out_mod_clk_unprepare;
+ }

ret = sunxi_nfc_rst(nfc);
if (ret)
@@ -2262,8 +2261,7 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
if (nfc->dmac)
dma_release_channel(nfc->dmac);
out_ahb_reset_reassert:
- if (!IS_ERR(nfc->reset))
- reset_control_assert(nfc->reset);
+ reset_control_assert(nfc->reset);
out_mod_clk_unprepare:
clk_disable_unprepare(nfc->mod_clk);
out_ahb_clk_unprepare:
@@ -2278,8 +2276,7 @@ static int sunxi_nfc_remove(struct platform_device *pdev)

sunxi_nand_chips_cleanup(nfc);

- if (!IS_ERR(nfc->reset))
- reset_control_assert(nfc->reset);
+ reset_control_assert(nfc->reset);

if (nfc->dmac)
dma_release_channel(nfc->dmac);
--
2.11.0