[v2, 5/5] net: dpaa2: fix and improve dpaa2-ptp driver

[Yangbo Lu]

This patch is to fix and improve dpaa2-ptp driver
in some places.

- Fixed the return for some functions.
- Replaced kzalloc with devm_kzalloc.
- Removed dev_set_drvdata(dev, NULL).
- Made ptp_dpaa2_caps const.

Signed-off-by: Yangbo Lu <yangbo...@nxp.com>
---
Changes for v2:
        - Added this patch.
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c |   25 ++++++++--------------
 1 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c 
b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c
index c73eef2..84b942b 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c
@@ -46,7 +46,7 @@ static int ptp_dpaa2_adjfreq(struct ptp_clock_info *ptp, s32 
ppb)
                                          mc_dev->mc_handle, tmr_add);
        if (err)
                dev_err(dev, "dprtc_set_freq_compensation err %d\n", err);
-       return 0;
+       return err;
 }
 
 static int ptp_dpaa2_adjtime(struct ptp_clock_info *ptp, s64 delta)
@@ -61,17 +61,15 @@ static int ptp_dpaa2_adjtime(struct ptp_clock_info *ptp, 
s64 delta)
        err = dprtc_get_time(mc_dev->mc_io, 0, mc_dev->mc_handle, &now);
        if (err) {
                dev_err(dev, "dprtc_get_time err %d\n", err);
-               return 0;
+               return err;
        }
 
        now += delta;
 
        err = dprtc_set_time(mc_dev->mc_io, 0, mc_dev->mc_handle, now);
-       if (err) {
+       if (err)
                dev_err(dev, "dprtc_set_time err %d\n", err);
-               return 0;
-       }
-       return 0;
+       return err;
 }
 
 static int ptp_dpaa2_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
@@ -87,12 +85,12 @@ static int ptp_dpaa2_gettime(struct ptp_clock_info *ptp, 
struct timespec64 *ts)
        err = dprtc_get_time(mc_dev->mc_io, 0, mc_dev->mc_handle, &ns);
        if (err) {
                dev_err(dev, "dprtc_get_time err %d\n", err);
-               return 0;
+               return err;
        }
 
        ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder);
        ts->tv_nsec = remainder;
-       return 0;
+       return err;
 }
 
 static int ptp_dpaa2_settime(struct ptp_clock_info *ptp,
@@ -111,10 +109,10 @@ static int ptp_dpaa2_settime(struct ptp_clock_info *ptp,
        err = dprtc_set_time(mc_dev->mc_io, 0, mc_dev->mc_handle, ns);
        if (err)
                dev_err(dev, "dprtc_set_time err %d\n", err);
-       return 0;
+       return err;
 }
 
-static struct ptp_clock_info ptp_dpaa2_caps = {
+static const struct ptp_clock_info ptp_dpaa2_caps = {
        .owner          = THIS_MODULE,
        .name           = "DPAA2 PTP Clock",
        .max_adj        = 512000,
@@ -136,7 +134,7 @@ static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
        u32 tmr_add = 0;
        int err;
 
-       ptp_dpaa2 = kzalloc(sizeof(*ptp_dpaa2), GFP_KERNEL);
+       ptp_dpaa2 = devm_kzalloc(dev, sizeof(*ptp_dpaa2), GFP_KERNEL);
        if (!ptp_dpaa2)
                return -ENOMEM;
 
@@ -182,8 +180,6 @@ static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
 err_free_mcp:
        fsl_mc_portal_free(mc_dev->mc_io);
 err_exit:
-       kfree(ptp_dpaa2);
-       dev_set_drvdata(dev, NULL);
        return err;
 }
 
@@ -198,9 +194,6 @@ static int dpaa2_ptp_remove(struct fsl_mc_device *mc_dev)
        dprtc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
        fsl_mc_portal_free(mc_dev->mc_io);
 
-       kfree(ptp_dpaa2);
-       dev_set_drvdata(dev, NULL);
-
        return 0;
 }
 
-- 
1.7.1

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