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memory: omap-gpmc: simplify locking with guard()

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Simplify error handling (less gotos) over locks with guard().

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240823-b4-cleanup-h-guard-v1-3-01668915bd55@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Krzysztof Kozlowski 2024-08-23 12:15:58 +02:00
parent f1619986d7
commit c93ad423ed
1 changed files with 11 additions and 13 deletions
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24
drivers/memory/omap-gpmc.c
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@ -9,6 +9,7 @@
* Copyright (C) 2009 Texas Instruments
* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
*/
#include <linux/cleanup.h>
#include <linux/cpu_pm.h>
#include <linux/irq.h>
#include <linux/kernel.h>
@ -989,18 +990,18 @@ int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
if (size > (1 << GPMC_SECTION_SHIFT))
return -ENOMEM;
spin_lock(&gpmc_mem_lock);
if (gpmc_cs_reserved(cs)) {
r = -EBUSY;
goto out;
}
guard(spinlock)(&gpmc_mem_lock);
if (gpmc_cs_reserved(cs))
return -EBUSY;
if (gpmc_cs_mem_enabled(cs))
r = adjust_resource(res, res->start & ~(size - 1), size);
if (r < 0)
r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0,
size, NULL, NULL);
if (r < 0)
goto out;
return r;
/* Disable CS while changing base address and size mask */
gpmc_cs_disable_mem(cs);
@ -1008,16 +1009,15 @@ int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
r = gpmc_cs_set_memconf(cs, res->start, resource_size(res));
if (r < 0) {
release_resource(res);
goto out;
return r;
}
/* Enable CS */
gpmc_cs_enable_mem(cs);
*base = res->start;
gpmc_cs_set_reserved(cs, 1);
out:
spin_unlock(&gpmc_mem_lock);
return r;
return 0;
}
EXPORT_SYMBOL(gpmc_cs_request);
@ -1026,10 +1026,9 @@ void gpmc_cs_free(int cs)
struct gpmc_cs_data *gpmc;
struct resource *res;
spin_lock(&gpmc_mem_lock);
guard(spinlock)(&gpmc_mem_lock);
if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) {
WARN(1, "Trying to free non-reserved GPMC CS%d\n", cs);
spin_unlock(&gpmc_mem_lock);
return;
}
gpmc = &gpmc_cs[cs];
@ -1039,7 +1038,6 @@ void gpmc_cs_free(int cs)
if (res->flags)
release_resource(res);
gpmc_cs_set_reserved(cs, 0);
spin_unlock(&gpmc_mem_lock);
}
EXPORT_SYMBOL(gpmc_cs_free);