[Qemu-devel] [[RFC]PATCH:hw/sd:sd_init()] hw/sd : modified the sd_init() function

[Tejaswini <tejaswinipoluri3@gmail.com>]

From: Tejaswini Poluri <tejaswinipoluri3@gmail.com>

Changed sd_init() to take SDstate by value and return state as success/failure
Edited the rest of the functions using sd_init() to accommodate the change

Signed-off-by: Tejaswini Poluri <tejaswinipoluri3@gmail.com>
---
 hw/sd/milkymist-memcard.c |  3 +--
 hw/sd/omap_mmc.c          |  6 ++----
 hw/sd/pl181.c             |  4 ++--
 hw/sd/sd.c                | 13 ++++++++-----
 hw/sd/ssi-sd.c            |  3 +--
 include/hw/sd/sd.h        |  2 +-
 6 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/hw/sd/milkymist-memcard.c b/hw/sd/milkymist-memcard.c
index 1f2f0ed..68e50e5 100644
--- a/hw/sd/milkymist-memcard.c
+++ b/hw/sd/milkymist-memcard.c
@@ -259,8 +259,7 @@ static int milkymist_memcard_init(SysBusDevice *dev)
     /* FIXME use a qdev drive property instead of drive_get_next() */
     dinfo = drive_get_next(IF_SD);
     blk = dinfo ? blk_by_legacy_dinfo(dinfo) : NULL;
-    s->card = sd_init(blk, false);
-    if (s->card == NULL) {
+    if (sd_init(s->card, blk, false) < 0) {
         return -1;
     }
 
diff --git a/hw/sd/omap_mmc.c b/hw/sd/omap_mmc.c
index e934cd3..add48a6 100644
--- a/hw/sd/omap_mmc.c
+++ b/hw/sd/omap_mmc.c
@@ -593,8 +593,7 @@ struct omap_mmc_s *omap_mmc_init(hwaddr base,
     memory_region_add_subregion(sysmem, base, &s->iomem);
 
     /* Instantiate the storage */
-    s->card = sd_init(blk, false);
-    if (s->card == NULL) {
+    if (sd_init(s->card, blk, false) < 0) {
         exit(1);
     }
 
@@ -620,8 +619,7 @@ struct omap_mmc_s *omap2_mmc_init(struct omap_target_agent_s *ta,
     omap_l4_attach(ta, 0, &s->iomem);
 
     /* Instantiate the storage */
-    s->card = sd_init(blk, false);
-    if (s->card == NULL) {
+    if (sd_init(s->card, blk, false) < 0) {
         exit(1);
     }
 
diff --git a/hw/sd/pl181.c b/hw/sd/pl181.c
index 82c63a4..c2e2459 100644
--- a/hw/sd/pl181.c
+++ b/hw/sd/pl181.c
@@ -502,8 +502,8 @@ static void pl181_realize(DeviceState *dev, Error **errp)
 
     /* FIXME use a qdev drive property instead of drive_get_next() */
     dinfo = drive_get_next(IF_SD);
-    s->card = sd_init(dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, false);
-    if (s->card == NULL) {
+    if (sd_init(s->card, dinfo ?
+		blk_by_legacy_dinfo(dinfo) : NULL, false) < 0) {
         error_setg(errp, "sd_init failed");
     }
 }
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index ba47bff..b593939 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -562,7 +562,7 @@ static const VMStateDescription sd_vmstate = {
 };
 
 /* Legacy initialization function for use by non-qdevified callers */
-SDState *sd_init(BlockBackend *blk, bool is_spi)
+int sd_init(SDState *sd_state, BlockBackend *blk, bool is_spi)
 {
     Object *obj;
     DeviceState *dev;
@@ -573,16 +573,19 @@ SDState *sd_init(BlockBackend *blk, bool is_spi)
     qdev_prop_set_drive(dev, "drive", blk, &err);
     if (err) {
         error_report("sd_init failed: %s", error_get_pretty(err));
-        return NULL;
+        return -1;
     }
     qdev_prop_set_bit(dev, "spi", is_spi);
     object_property_set_bool(obj, true, "realized", &err);
     if (err) {
         error_report("sd_init failed: %s", error_get_pretty(err));
-        return NULL;
+        return -1;
     }
-
-    return SD_CARD(dev);
+    sd_state = SD_CARD(dev);
+    if (!sd_state) {
+		return -1;
+	}
+    return 0;
 }
 
 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index 24001dc..c70b32d 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -244,8 +244,7 @@ static void ssi_sd_realize(SSISlave *d, Error **errp)
     s->mode = SSI_SD_CMD;
     /* FIXME use a qdev drive property instead of drive_get_next() */
     dinfo = drive_get_next(IF_SD);
-    s->sd = sd_init(dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, true);
-    if (s->sd == NULL) {
+    if (sd_init(s->sd, dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, true) < 0) {
         error_setg(errp, "Device initialization failed.");
         return;
     }
diff --git a/include/hw/sd/sd.h b/include/hw/sd/sd.h
index 96caefe..63741c0 100644
--- a/include/hw/sd/sd.h
+++ b/include/hw/sd/sd.h
@@ -115,7 +115,7 @@ typedef struct {
 } SDBusClass;
 
 /* Legacy functions to be used only by non-qdevified callers */
-SDState *sd_init(BlockBackend *bs, bool is_spi);
+int sd_init(SDState *sd, BlockBackend *bs, bool is_spi);
 int sd_do_command(SDState *sd, SDRequest *req,
                   uint8_t *response);
 void sd_write_data(SDState *sd, uint8_t value);
-- 
2.7.4