omapfb: dss: Do not duplicate features data

As features data are read only, there is no need to allocate their
copy on the heap.

Suggested-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Tested-by: Adam Ford <aford173@gmail.com> #omap3630
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Markus Elfring <elfring@users.sourceforge.net>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Adam Ford <adam.ford@logicpd.com>
[b.zolnierkie: fixed minor CodingStyle errors reported by checkpatch.pl]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
index 7a75dfd..fb605ae 100644 (file)
--- a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
@@ -3976,52 +3976,33 @@ static const struct dispc_features omap54xx_dispc_feats = {
        .has_writeback          =       true,
 };
 
-static int dispc_init_features(struct platform_device *pdev)
+static const struct dispc_features *dispc_get_features(void)
 {
-       const struct dispc_features *src;
-       struct dispc_features *dst;
-
-       dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
-       if (!dst) {
-               dev_err(&pdev->dev, "Failed to allocate DISPC Features\n");
-               return -ENOMEM;
-       }
-
        switch (omapdss_get_version()) {
        case OMAPDSS_VER_OMAP24xx:
-               src = &omap24xx_dispc_feats;
-               break;
+               return &omap24xx_dispc_feats;
 
        case OMAPDSS_VER_OMAP34xx_ES1:
-               src = &omap34xx_rev1_0_dispc_feats;
-               break;
+               return &omap34xx_rev1_0_dispc_feats;
 
        case OMAPDSS_VER_OMAP34xx_ES3:
        case OMAPDSS_VER_OMAP3630:
        case OMAPDSS_VER_AM35xx:
        case OMAPDSS_VER_AM43xx:
-               src = &omap34xx_rev3_0_dispc_feats;
-               break;
+               return &omap34xx_rev3_0_dispc_feats;
 
        case OMAPDSS_VER_OMAP4430_ES1:
        case OMAPDSS_VER_OMAP4430_ES2:
        case OMAPDSS_VER_OMAP4:
-               src = &omap44xx_dispc_feats;
-               break;
+               return &omap44xx_dispc_feats;
 
        case OMAPDSS_VER_OMAP5:
        case OMAPDSS_VER_DRA7xx:
-               src = &omap54xx_dispc_feats;
-               break;
+               return &omap54xx_dispc_feats;
 
        default:
-               return -ENODEV;
+               return NULL;
        }
-
-       memcpy(dst, src, sizeof(*dst));
-       dispc.feat = dst;
-
-       return 0;
 }
 
 static irqreturn_t dispc_irq_handler(int irq, void *arg)
@@ -4078,9 +4059,9 @@ static int dispc_bind(struct device *dev, struct device *master, void *data)
 
        spin_lock_init(&dispc.control_lock);
 
-       r = dispc_init_features(dispc.pdev);
-       if (r)
-               return r;
+       dispc.feat = dispc_get_features();
+       if (!dispc.feat)
+               return -ENODEV;
 
        dispc_mem = platform_get_resource(dispc.pdev, IORESOURCE_MEM, 0);
        if (!dispc_mem) {

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
index 48c6500..39fe724 100644 (file)
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
@@ -887,58 +887,37 @@ static const struct dss_features dra7xx_dss_feats = {
        .num_ports              =       ARRAY_SIZE(dra7xx_ports),
 };
 
-static int dss_init_features(struct platform_device *pdev)
+static const struct dss_features *dss_get_features(void)
 {
-       const struct dss_features *src;
-       struct dss_features *dst;
-
-       dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
-       if (!dst) {
-               dev_err(&pdev->dev, "Failed to allocate local DSS Features\n");
-               return -ENOMEM;
-       }
-
        switch (omapdss_get_version()) {
        case OMAPDSS_VER_OMAP24xx:
-               src = &omap24xx_dss_feats;
-               break;
+               return &omap24xx_dss_feats;
 
        case OMAPDSS_VER_OMAP34xx_ES1:
        case OMAPDSS_VER_OMAP34xx_ES3:
        case OMAPDSS_VER_AM35xx:
-               src = &omap34xx_dss_feats;
-               break;
+               return &omap34xx_dss_feats;
 
        case OMAPDSS_VER_OMAP3630:
-               src = &omap3630_dss_feats;
-               break;
+               return &omap3630_dss_feats;
 
        case OMAPDSS_VER_OMAP4430_ES1:
        case OMAPDSS_VER_OMAP4430_ES2:
        case OMAPDSS_VER_OMAP4:
-               src = &omap44xx_dss_feats;
-               break;
+               return &omap44xx_dss_feats;
 
        case OMAPDSS_VER_OMAP5:
-               src = &omap54xx_dss_feats;
-               break;
+               return &omap54xx_dss_feats;
 
        case OMAPDSS_VER_AM43xx:
-               src = &am43xx_dss_feats;
-               break;
+               return &am43xx_dss_feats;
 
        case OMAPDSS_VER_DRA7xx:
-               src = &dra7xx_dss_feats;
-               break;
+               return &dra7xx_dss_feats;
 
        default:
-               return -ENODEV;
+               return NULL;
        }
-
-       memcpy(dst, src, sizeof(*dst));
-       dss.feat = dst;
-
-       return 0;
 }
 
 static void dss_uninit_ports(struct platform_device *pdev);
@@ -1104,9 +1083,9 @@ static int dss_bind(struct device *dev)
 
        dss.pdev = pdev;
 
-       r = dss_init_features(dss.pdev);
-       if (r)
-               return r;
+       dss.feat = dss_get_features();
+       if (!dss.feat)
+               return -ENODEV;
 
        dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
        if (!dss_mem) {

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi_phy.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi_phy.c
index 9a13c35..eee09b4 100644 (file)
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi_phy.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi_phy.c
@@ -189,47 +189,30 @@ static const struct hdmi_phy_features omap54xx_phy_feats = {
        .max_phy        =       186000000,
 };
 
-static int hdmi_phy_init_features(struct platform_device *pdev)
+static const struct hdmi_phy_features *hdmi_phy_get_features(void)
 {
-       struct hdmi_phy_features *dst;
-       const struct hdmi_phy_features *src;
-
-       dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
-       if (!dst) {
-               dev_err(&pdev->dev, "Failed to allocate HDMI PHY Features\n");
-               return -ENOMEM;
-       }
-
        switch (omapdss_get_version()) {
        case OMAPDSS_VER_OMAP4430_ES1:
        case OMAPDSS_VER_OMAP4430_ES2:
        case OMAPDSS_VER_OMAP4:
-               src = &omap44xx_phy_feats;
-               break;
+               return &omap44xx_phy_feats;
 
        case OMAPDSS_VER_OMAP5:
        case OMAPDSS_VER_DRA7xx:
-               src = &omap54xx_phy_feats;
-               break;
+               return &omap54xx_phy_feats;
 
        default:
-               return -ENODEV;
+               return NULL;
        }
-
-       memcpy(dst, src, sizeof(*dst));
-       phy_feat = dst;
-
-       return 0;
 }
 
 int hdmi_phy_init(struct platform_device *pdev, struct hdmi_phy_data *phy)
 {
-       int r;
        struct resource *res;
 
-       r = hdmi_phy_init_features(pdev);
-       if (r)
-               return r;
+       phy_feat = hdmi_phy_get_features();
+       if (!phy_feat)
+               return -ENODEV;
 
        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
        if (!res) {