ARM: OMAP: clean up some smatch warnings, fix some printk(KERN_ERR ...

Resolve the following warnings from smatch:

arch/arm/mach-omap2/gpmc.c:282 gpmc_cs_set_timings() info: why not propagate 'div' from gpmc_cs_calc_divider() instead of -1?
arch/arm/mach-omap2/serial.c:328 omap_serial_init_port() error: 'pdev' dereferencing possible ERR_PTR()
arch/arm/mach-omap2/timer.c:213 omap2_gp_clockevent_init() Error invalid range 4096 to -1
arch/arm/mach-omap2/gpio.c:63 omap2_gpio_dev_init() warn: possible memory leak of 'pdata'
arch/arm/mach-omap2/omap_hwmod.c:1478 _assert_hardreset() warn: assigning -22 to unsigned variable 'ret'
arch/arm/mach-omap2/omap_hwmod.c:1487 _assert_hardreset() warn: 4294963201 is more than 255 (max '(ret)' can be) so this is always the same.
arch/arm/mach-omap2/omap_hwmod.c:1545 _read_hardreset() warn: assigning -22 to unsigned variable 'ret'
arch/arm/mach-omap2/omap_hwmod.c:1554 _read_hardreset() warn: 4294963201 is more than 255 (max '(ret)' can be) so this is always the same.
arch/arm/mach-omap2/dpll3xxx.c:629 omap3_clkoutx2_recalc() error: we previously assumed 'pclk' could be null (see line 627)
arch/arm/mach-omap2/board-n8x0.c:422 n8x0_mmc_late_init() Error invalid range 14 to 13
arch/arm/mach-omap1/leds-h2p2-debug.c:71 h2p2_dbg_leds_event() error: potentially derefencing uninitialized 'fpga'.
arch/arm/plat-omap/mux.c:79 omap_cfg_reg() Error invalid range 4096 to -1

Thanks to Tony Lindgren <tony@atomide.com> for pointing out that BUG()
can be disabled.  The changes in the first version that removed the
subsequent return() after BUG() states have been dropped.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap1/leds-h2p2-debug.c

@@ -68,11 +68,13 @@ void h2p2_dbg_leds_event(led_event_t evt)
 			gpio_set_value(GPIO_IDLE, 0);
 		}
 
-		__raw_writew(~0, &fpga->leds);
 		led_state &= ~LED_STATE_ENABLED;
-		if (evt == led_halted) {
-			iounmap(fpga);
-			fpga = NULL;
+		if (fpga) {
+			__raw_writew(~0, &fpga->leds);
+			if (evt == led_halted) {
+				iounmap(fpga);
+				fpga = NULL;
+			}
 		}
 
 		goto done;
@@ -158,7 +160,7 @@ void h2p2_dbg_leds_event(led_event_t evt)
 	/*
 	 *  Actually burn the LEDs
 	 */
-	if (led_state & LED_STATE_ENABLED)
+	if (led_state & LED_STATE_ENABLED && fpga)
 		__raw_writew(~hw_led_state, &fpga->leds);
 
 done:

arch/arm/mach-omap2/dpll3xxx.c

@@ -623,8 +623,11 @@ unsigned long omap3_clkoutx2_recalc(struct clk *clk)
 	while (pclk && !pclk->dpll_data)
 		pclk = pclk->parent;
 
-	/* clk does not have a DPLL as a parent? */
-	WARN_ON(!pclk);
+	/* clk does not have a DPLL as a parent?  error in the clock data */
+	if (!pclk) {
+		WARN_ON(1);
+		return 0;
+	}
 
 	dd = pclk->dpll_data;
 

arch/arm/mach-omap2/gpio.c

@@ -60,6 +60,7 @@ static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
 	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
 	if (!pdata->regs) {
 		pr_err("gpio%d: Memory allocation failed\n", id);
+		kfree(pdata);
 		return -ENOMEM;
 	}
 

arch/arm/mach-omap2/gpmc.c

@@ -279,7 +279,7 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
 
 	div = gpmc_cs_calc_divider(cs, t->sync_clk);
 	if (div < 0)
-		return -1;
+		return div;
 
 	GPMC_SET_ONE(GPMC_CS_CONFIG2,  0,  3, cs_on);
 	GPMC_SET_ONE(GPMC_CS_CONFIG2,  8, 12, cs_rd_off);

arch/arm/mach-omap2/omap_hwmod.c

@@ -1438,8 +1438,8 @@ static int _init_clocks(struct omap_hwmod *oh, void *data)
  * Return the bit position of the reset line that match the
  * input name. Return -ENOENT if not found.
  */
-static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name,
-			    struct omap_hwmod_rst_info *ohri)
+static int _lookup_hardreset(struct omap_hwmod *oh, const char *name,
+			     struct omap_hwmod_rst_info *ohri)
 {
 	int i;
 
@@ -1475,7 +1475,7 @@ static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name,
 static int _assert_hardreset(struct omap_hwmod *oh, const char *name)
 {
 	struct omap_hwmod_rst_info ohri;
-	u8 ret = -EINVAL;
+	int ret = -EINVAL;
 
 	if (!oh)
 		return -EINVAL;
@@ -1484,7 +1484,7 @@ static int _assert_hardreset(struct omap_hwmod *oh, const char *name)
 		return -ENOSYS;
 
 	ret = _lookup_hardreset(oh, name, &ohri);
-	if (IS_ERR_VALUE(ret))
+	if (ret < 0)
 		return ret;
 
 	ret = soc_ops.assert_hardreset(oh, &ohri);
@@ -1542,7 +1542,7 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name)
 static int _read_hardreset(struct omap_hwmod *oh, const char *name)
 {
 	struct omap_hwmod_rst_info ohri;
-	u8 ret = -EINVAL;
+	int ret = -EINVAL;
 
 	if (!oh)
 		return -EINVAL;
@@ -1551,7 +1551,7 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name)
 		return -ENOSYS;
 
 	ret = _lookup_hardreset(oh, name, &ohri);
-	if (IS_ERR_VALUE(ret))
+	if (ret < 0)
 		return ret;
 
 	return soc_ops.is_hardreset_asserted(oh, &ohri);

arch/arm/mach-omap2/serial.c

@@ -313,8 +313,11 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
 
 	pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size,
 				 NULL, 0, false);
-	WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n",
-	     name, oh->name);
+	if (IS_ERR(pdev)) {
+		WARN(1, "Could not build omap_device for %s: %s.\n", name,
+		     oh->name);
+		return;
+	}
 
 	if ((console_uart_id == bdata->id) && no_console_suspend)
 		omap_device_disable_idle_on_suspend(pdev);

arch/arm/mach-omap2/timer.c

@@ -211,7 +211,7 @@ static void __init omap2_gp_clockevent_init(int gptimer_id,
 	res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source);
 	BUG_ON(res);
 
-	omap2_gp_timer_irq.dev_id = (void *)&clkev;
+	omap2_gp_timer_irq.dev_id = &clkev;
 	setup_irq(clkev.irq, &omap2_gp_timer_irq);
 
 	__omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);

arch/arm/plat-omap/mux.c

@@ -76,7 +76,7 @@ int __init_or_module omap_cfg_reg(const unsigned long index)
 		return -ENODEV;
 	}
 
-	reg = (struct pin_config *)&mux_cfg->pins[index];
+	reg = &mux_cfg->pins[index];
 
 	if (!mux_cfg->cfg_reg)
 		return -ENODEV;