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https://github.com/zephyrproject-rtos/zephyr
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8345e5ebf0
The various macros to do checks in system call handlers all implictly would generate a kernel oops if a check failed. This is undesirable for a few reasons: * System call handlers that acquire resources in the handler have no good recourse for cleanup if a check fails. * In some cases we may want to propagate a return value back to the caller instead of just killing the calling thread, even though the base API doesn't do these checks. These macros now all return a value, if nonzero is returned the check failed. K_OOPS() now wraps these calls to generate a kernel oops. At the moment, the policy for all APIs has not changed. They still all oops upon a failed check/ The macros now use the Z_ notation for private APIs. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
26 lines
581 B
C
26 lines
581 B
C
/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <dma.h>
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#include <syscall_handler.h>
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/* Both of these APIs are assuming that the drive implementations are checking
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* the validity of the channel ID and returning -errno if it's bogus
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*/
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Z_SYSCALL_HANDLER(dma_start, dev, channel)
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{
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Z_OOPS(Z_SYSCALL_DRIVER_DMA(dev, start));
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return _impl_dma_start((struct device *)dev, channel);
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}
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Z_SYSCALL_HANDLER(dma_stop, dev, channel)
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{
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Z_OOPS(Z_SYSCALL_DRIVER_DMA(dev, stop));
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return _impl_dma_stop((struct device *)dev, channel);
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}
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