ARM: OMAP: use consistent error checking
Consistently check errors using the usual method used in the kernel
for much of its history. For instance:
int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
{
int div;
div = gpmc_calc_divider(t->sync_clk);
if (div < 0)
return div;
static int gpmc_set_async_mode(int cs, struct gpmc_timings *t)
{
...
return gpmc_cs_set_timings(cs, t);
.....
ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t);
if (IS_ERR_VALUE(ret))
return ret;
So, gpmc_cs_set_timings() thinks any negative return value is an error,
but where we check that in higher levels, only a limited range are
errors...
There is only _one_ use of IS_ERR_VALUE() in arch/arm which is really
appropriate, and that is in arch/arm/include/asm/syscall.h:
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
unsigned long error = regs->ARM_r0;
return IS_ERR_VALUE(error) ? error : 0;
}
because this function really does have to differentiate between error
return values and addresses which look like negative numbers (eg, from
mmap()).
So, here's a patch to remove them from OMAP, except for the above.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 22c483d..1957426 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -457,7 +457,7 @@
/* Initialize the omap3 opp table if not already created. */
r = omap3_opp_init();
- if (IS_ERR_VALUE(r) && (r != -EEXIST)) {
+ if (r < 0 && (r != -EEXIST)) {
pr_err("%s: opp default init failed\n", __func__);
return r;
}
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index e4ec3a6..2191f25 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -596,7 +596,7 @@
return -ENOENT;
r = clk_set_rate(mpurate_ck, mpurate);
- if (IS_ERR_VALUE(r)) {
+ if (r < 0) {
WARN(1, "clock: %s: unable to set MPU rate to %d: %d\n",
mpurate_ck_name, mpurate, r);
clk_put(mpurate_ck);
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index 94a349e..7f369b4 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -303,7 +303,7 @@
t = omap2_onenand_calc_async_timings();
ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
omap2_onenand_set_async_mode(onenand_base);
@@ -325,7 +325,7 @@
t = omap2_onenand_calc_sync_timings(gpmc_onenand_data, freq);
ret = gpmc_set_sync_mode(gpmc_onenand_data->cs, &t);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
set_onenand_cfg(onenand_base);
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 8033cb7..c0a2c26e 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -709,7 +709,7 @@
return -EINVAL;
gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0);
- if (IS_ERR_VALUE(gpmc_irq_start)) {
+ if (gpmc_irq_start < 0) {
pr_err("irq_alloc_descs failed\n");
return gpmc_irq_start;
}
@@ -797,7 +797,7 @@
continue;
gpmc_cs_get_memconf(cs, &base, &size);
rc = gpmc_cs_insert_mem(cs, base, size);
- if (IS_ERR_VALUE(rc)) {
+ if (rc < 0) {
while (--cs >= 0)
if (gpmc_cs_mem_enabled(cs))
gpmc_cs_delete_mem(cs);
@@ -1164,14 +1164,14 @@
GPMC_REVISION_MINOR(l));
rc = gpmc_mem_init();
- if (IS_ERR_VALUE(rc)) {
+ if (rc < 0) {
clk_disable_unprepare(gpmc_l3_clk);
clk_put(gpmc_l3_clk);
dev_err(gpmc_dev, "failed to reserve memory\n");
return rc;
}
- if (IS_ERR_VALUE(gpmc_setup_irq()))
+ if (gpmc_setup_irq() < 0)
dev_warn(gpmc_dev, "gpmc_setup_irq failed\n");
return 0;
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 1bc16cd..01839a0 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -333,7 +333,7 @@
int oh_cnt, i, ret = 0;
oh_cnt = of_property_count_strings(node, "ti,hwmods");
- if (!oh_cnt || IS_ERR_VALUE(oh_cnt)) {
+ if (oh_cnt <= 0) {
dev_dbg(&pdev->dev, "No 'hwmods' to build omap_device\n");
return -ENODEV;
}
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 4653efb..b7c0a2d 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1661,7 +1661,7 @@
return -ENOSYS;
ret = _lookup_hardreset(oh, name, &ohri);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
if (oh->clkdm) {
@@ -2387,7 +2387,7 @@
_init_mpu_rt_base(oh, NULL);
r = _init_clocks(oh, NULL);
- if (IS_ERR_VALUE(r)) {
+ if (r < 0) {
WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh->name);
return -EINVAL;
}
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index b8ad6e6..390c1b6 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -288,7 +288,7 @@
r = -EINVAL;
} else {
r = clk_set_parent(timer->fclk, src);
- if (IS_ERR_VALUE(r))
+ if (r < 0)
pr_warn("%s: %s cannot set source\n",
__func__, oh->name);
clk_put(src);
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 7cda34d..5679ec4 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -505,7 +505,7 @@
}
ret = clk_set_parent(timer->fclk, parent);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
pr_err("%s: failed to set %s as parent\n", __func__,
parent_name);