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drm/amdkfd: return -ENOTTY for unsupported IOCTLs

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[ Upstream commit 57af162bfc8c05332a28c4d458d246cc46d2746d ]

Some kfd ioctls may not be available depending on the kernel version the
user is running, as such we need to report -ENOTTY so userland can
determine the cause of the ioctl failure.

Signed-off-by: Geoffrey McRae <geoffrey.mcrae@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Geoffrey McRae 2025-07-08 13:53:40 +10:00 • committed by Greg Kroah-Hartman
commit 3dca940d84
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
View file

@ -1796,8 +1796,10 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
unsigned int usize, asize;
int retcode = -EINVAL;
if (nr >= AMDKFD_CORE_IOCTL_COUNT)
if (nr >= AMDKFD_CORE_IOCTL_COUNT) {
retcode = -ENOTTY;
goto err_i1;
}
if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
u32 amdkfd_size;
@ -1810,8 +1812,10 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
asize = amdkfd_size;
cmd = ioctl->cmd;
} else
} else {
retcode = -ENOTTY;
goto err_i1;
}
dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);