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drm/imagination: Use memdup_user() helper

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Switching to memdup_user(), which combines kmalloc() and copy_from_user(),
and it can simplfy code.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240902023300.1214753-1-ruanjinjie@huawei.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
This commit is contained in:
Jinjie Ruan 2024-09-02 10:33:00 +08:00 committed by Matt Coster
parent 3742c20958
commit 2872a57c7a
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GPG Key ID: 79BC19F3D9DE6AB0
1 changed files with 3 additions and 15 deletions
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18
drivers/gpu/drm/imagination/pvr_context.c
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@ -69,26 +69,14 @@ process_static_context_state(struct pvr_device *pvr_dev, const struct pvr_stream
void *stream;
int err;
stream = kzalloc(stream_size, GFP_KERNEL);
if (!stream)
return -ENOMEM;
if (copy_from_user(stream, u64_to_user_ptr(stream_user_ptr), stream_size)) {
err = -EFAULT;
goto err_free;
}
stream = memdup_user(u64_to_user_ptr(stream_user_ptr), stream_size);
if (IS_ERR(stream))
return PTR_ERR(stream);
err = pvr_stream_process(pvr_dev, cmd_defs, stream, stream_size, dest);
if (err)
goto err_free;
kfree(stream);
return 0;
err_free:
kfree(stream);
return err;
}