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/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;