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f2151613e0
The errno.h header is not always included indirectly, leading to rare randconfig build warnings. drivers/media/pci/mgb4/mgb4_regs.c:20:11: error: use of undeclared identifier 'EINVAL' 20 | return -EINVAL; Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
31 lines
742 B
C
31 lines
742 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2021-2022 Digiteq Automotive
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* author: Martin Tuma <martin.tuma@digiteqautomotive.com>
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*/
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include "mgb4_regs.h"
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int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)
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{
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regs->mapbase = res->start;
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regs->mapsize = resource_size(res);
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if (!request_mem_region(regs->mapbase, regs->mapsize, res->name))
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return -EINVAL;
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regs->membase = ioremap(regs->mapbase, regs->mapsize);
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if (!regs->membase) {
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release_mem_region(regs->mapbase, regs->mapsize);
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return -EINVAL;
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}
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return 0;
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}
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void mgb4_regs_free(struct mgb4_regs *regs)
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{
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iounmap(regs->membase);
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release_mem_region(regs->mapbase, regs->mapsize);
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}
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