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>

6 files changed, 19 insertions, 12 deletions

diff --git a/arch/arm/mach-omap2/dpll3xxx.c b/arch/arm/mach-omap2/dpll3xxx.c
index b9c8d2f6a81f..4d0e645cab5f 100644
--- a/arch/arm/mach-omap2/dpll3xxx.c
+++ b/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;
 
diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 9ad7d489b0de..30a3a94ab1ef 100644
--- a/arch/arm/mach-omap2/gpio.c
+++ b/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;
         }
 
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index b2b5759ab0fe..f682e071c66f 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/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);
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 6ca8e519968d..bd69eaefcc97 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/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);
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index c1b93c752d70..0cc79d34c9f0 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/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);
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 2ff6d41ec6c6..7e688c7c85bb 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/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);