From c48cd659892962f79bba4b4e0eedea8e5aa54c44 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 13 Mar 2013 20:44:21 +0000 Subject: [PATCH] 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 Signed-off-by: Russell King --- arch/arm/mach-omap2/board-omap3beagle.c | 2 +- arch/arm/mach-omap2/clock.c | 2 +- arch/arm/mach-omap2/gpmc-onenand.c | 4 ++-- arch/arm/mach-omap2/gpmc.c | 8 ++++---- arch/arm/mach-omap2/omap_device.c | 2 +- arch/arm/mach-omap2/omap_hwmod.c | 4 ++-- arch/arm/mach-omap2/timer.c | 2 +- arch/arm/plat-omap/dmtimer.c | 2 +- 8 files changed, 13 insertions(+), 13 deletions(-) diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c index 22c483d5dfa8..1957426b96fe 100644 --- a/arch/arm/mach-omap2/board-omap3beagle.c +++ b/arch/arm/mach-omap2/board-omap3beagle.c @@ -457,7 +457,7 @@ static int __init beagle_opp_init(void) /* 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 e4ec3a69ee2e..2191f25ad21b 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -596,7 +596,7 @@ int __init omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name) 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 94a349e4dc96..7f369b4f3917 100644 --- a/arch/arm/mach-omap2/gpmc-onenand.c +++ b/arch/arm/mach-omap2/gpmc-onenand.c @@ -303,7 +303,7 @@ static int omap2_onenand_setup_async(void __iomem *onenand_base) 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 @@ static int omap2_onenand_setup_sync(void __iomem *onenand_base, int *freq_ptr) 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 8033cb747c86..c0a2c26ed5a4 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -709,7 +709,7 @@ static int gpmc_setup_irq(void) 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 @@ static int gpmc_mem_init(void) 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 @@ static int gpmc_probe(struct platform_device *pdev) 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 1bc16cdafdd6..01839a0b5024 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -333,7 +333,7 @@ static int omap_device_build_from_dt(struct platform_device *pdev) 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 4653efb87a27..b7c0a2d3f2c7 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1661,7 +1661,7 @@ static int _deassert_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; if (oh->clkdm) { @@ -2387,7 +2387,7 @@ static int __init _init(struct omap_hwmod *oh, void *data) _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 b8ad6e632bb8..390c1b6e15bc 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -288,7 +288,7 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer, 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 7cda34d93c8b..5679ec41928b 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -505,7 +505,7 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) } 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); -- 2.34.1