[Qemu-devel] [PATCH v3 02/13] omap: Don't use hw_error() in device init() methods

From: Markus Armbruster <armbru@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	Markus Armbruster <armbru@pond.sub.org>
Subject: [Qemu-devel] [PATCH v3 02/13] omap: Don't use hw_error() in device init() methods
Date: Thu, 17 Dec 2015 17:35:10 +0100	[thread overview]
Message-ID: <1450370121-5768-3-git-send-email-armbru@redhat.com> (raw)
In-Reply-To: <1450370121-5768-1-git-send-email-armbru@redhat.com>

Device init() methods aren't supposed to call hw_error(), they should
report the error and fail cleanly.  Do that.

The errors are all device misconfiguration.  All callers use
qdev_init_nofail(), so this patch merely converts hw_error() crashes
into &error_abort crashes.  Improvement, because now it crashes closer
to where the misconfiguration bug would be, and a few more bad
examples of hw_error() use are gone.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/gpio/omap_gpio.c | 29 +++++++++++++++++++++--------
 hw/i2c/omap_i2c.c   |  8 ++++++--
 hw/intc/omap_intc.c | 10 +++++++---
 3 files changed, 34 insertions(+), 13 deletions(-)

diff --git a/hw/gpio/omap_gpio.c b/hw/gpio/omap_gpio.c
index 3c53898..63d8b42 100644
--- a/hw/gpio/omap_gpio.c
+++ b/hw/gpio/omap_gpio.c
@@ -21,6 +21,7 @@
 #include "hw/hw.h"
 #include "hw/arm/omap.h"
 #include "hw/sysbus.h"
+#include "qemu/error-report.h"
 
 struct omap_gpio_s {
     qemu_irq irq;
@@ -682,7 +683,8 @@ static int omap_gpio_init(SysBusDevice *sbd)
     struct omap_gpif_s *s = OMAP1_GPIO(dev);
 
     if (!s->clk) {
-        hw_error("omap-gpio: clk not connected\n");
+        error_report("omap-gpio: clk not connected");
+        return -1;
     }
     qdev_init_gpio_in(dev, omap_gpio_set, 16);
     qdev_init_gpio_out(dev, s->omap1.handler, 16);
@@ -700,25 +702,35 @@ static int omap2_gpio_init(SysBusDevice *sbd)
     int i;
 
     if (!s->iclk) {
-        hw_error("omap2-gpio: iclk not connected\n");
+        error_report("omap2-gpio: iclk not connected");
+        return -1;
     }
+
+    s->modulecount = s->mpu_model < omap2430 ? 4
+                   : s->mpu_model < omap3430 ? 5
+                   : 6;
+
+    for (i = 0; i < s->modulecount; i++) {
+        if (!s->fclk[i]) {
+            error_report("omap2-gpio: fclk%d not connected", i);
+            return -1;
+        }
+    }
+
     if (s->mpu_model < omap3430) {
-        s->modulecount = (s->mpu_model < omap2430) ? 4 : 5;
         memory_region_init_io(&s->iomem, OBJECT(s), &omap2_gpif_top_ops, s,
                               "omap2.gpio", 0x1000);
         sysbus_init_mmio(sbd, &s->iomem);
-    } else {
-        s->modulecount = 6;
     }
+
     s->modules = g_new0(struct omap2_gpio_s, s->modulecount);
     s->handler = g_new0(qemu_irq, s->modulecount * 32);
     qdev_init_gpio_in(dev, omap2_gpio_set, s->modulecount * 32);
     qdev_init_gpio_out(dev, s->handler, s->modulecount * 32);
+
     for (i = 0; i < s->modulecount; i++) {
         struct omap2_gpio_s *m = &s->modules[i];
-        if (!s->fclk[i]) {
-            hw_error("omap2-gpio: fclk%d not connected\n", i);
-        }
+
         m->revision = (s->mpu_model < omap3430) ? 0x18 : 0x25;
         m->handler = &s->handler[i * 32];
         sysbus_init_irq(sbd, &m->irq[0]); /* mpu irq */
@@ -728,6 +740,7 @@ static int omap2_gpio_init(SysBusDevice *sbd)
                               "omap.gpio-module", 0x1000);
         sysbus_init_mmio(sbd, &m->iomem);
     }
+
     return 0;
 }
 
diff --git a/hw/i2c/omap_i2c.c b/hw/i2c/omap_i2c.c
index b6f544a..8b0b146 100644
--- a/hw/i2c/omap_i2c.c
+++ b/hw/i2c/omap_i2c.c
@@ -20,6 +20,7 @@
 #include "hw/i2c/i2c.h"
 #include "hw/arm/omap.h"
 #include "hw/sysbus.h"
+#include "qemu/error-report.h"
 
 #define TYPE_OMAP_I2C "omap_i2c"
 #define OMAP_I2C(obj) OBJECT_CHECK(OMAPI2CState, (obj), TYPE_OMAP_I2C)
@@ -449,12 +450,15 @@ static int omap_i2c_init(SysBusDevice *sbd)
     OMAPI2CState *s = OMAP_I2C(dev);
 
     if (!s->fclk) {
-        hw_error("omap_i2c: fclk not connected\n");
+        error_report("omap_i2c: fclk not connected");
+        return -1;
     }
     if (s->revision >= OMAP2_INTR_REV && !s->iclk) {
         /* Note that OMAP1 doesn't have a separate interface clock */
-        hw_error("omap_i2c: iclk not connected\n");
+        error_report("omap_i2c: iclk not connected");
+        return -1;
     }
+
     sysbus_init_irq(sbd, &s->irq);
     sysbus_init_irq(sbd, &s->drq[0]);
     sysbus_init_irq(sbd, &s->drq[1]);
diff --git a/hw/intc/omap_intc.c b/hw/intc/omap_intc.c
index e9b38a3..07b6272 100644
--- a/hw/intc/omap_intc.c
+++ b/hw/intc/omap_intc.c
@@ -20,6 +20,7 @@
 #include "hw/hw.h"
 #include "hw/arm/omap.h"
 #include "hw/sysbus.h"
+#include "qemu/error-report.h"
 
 /* Interrupt Handlers */
 struct omap_intr_handler_bank_s {
@@ -367,7 +368,8 @@ static int omap_intc_init(SysBusDevice *sbd)
     struct omap_intr_handler_s *s = OMAP_INTC(dev);
 
     if (!s->iclk) {
-        hw_error("omap-intc: clk not connected\n");
+        error_report("omap-intc: clk not connected");
+        return -1;
     }
     s->nbanks = 1;
     sysbus_init_irq(sbd, &s->parent_intr[0]);
@@ -608,10 +610,12 @@ static int omap2_intc_init(SysBusDevice *sbd)
     struct omap_intr_handler_s *s = OMAP_INTC(dev);
 
     if (!s->iclk) {
-        hw_error("omap2-intc: iclk not connected\n");
+        error_report("omap2-intc: iclk not connected");
+        return -1;
     }
     if (!s->fclk) {
-        hw_error("omap2-intc: fclk not connected\n");
+        error_report("omap2-intc: fclk not connected");
+        return -1;
     }
     s->level_only = 1;
     s->nbanks = 3;
-- 
2.4.3
