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'struct mtk_adsp_ipc_ops' is not modified in these drivers.
Constifying this structure moves some data to a read-only section, so
increase overall security.
In order to do it, "struct mtk_adsp_ipc" also needs to be adjusted to this
new const qualifier.
On a x86_64, with allmodconfig:
Before:
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text data bss dec hex filename
15533 2383 0 17916 45fc sound/soc/sof/mediatek/mt8195/mt8195.o
After:
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text data bss dec hex filename
15557 2367 0 17924 4604 sound/soc/sof/mediatek/mt8195/mt8195.o
Signed-off-by: Christophe JAILLET <[email protected]>
Link: https://msgid.link/r/a45d6b2b5ec040ea0fc78fca662c2dca3f13a49f.1718312321.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <[email protected]>
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mtk_adsp_ipc_get_data() can return NULL, but the value is not checked
before being used, leading to static analysis warnings.
sound/soc/sof/mediatek/mt8195/mt8195.c:90:32: error: dereference of
NULL ‘0’ [CWE-476] [-Werror=analyzer-null-dereference]
90 | spin_lock_irqsave(&priv->sdev->ipc_lock, flags);
| ~~~~^~~~~~
It appears this is not really a possible problem, so remove those checks.
Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Rander Wang <[email protected]>
Reviewed-by: Daniel Baluta <[email protected]>
Reviewed-by: Yaochun Hung <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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Some of mediatek processors contain
the Tensilica HiFix DSP for audio processing.
The communication between Host CPU and DSP firmware is
taking place using a shared memory area for message passing.
ADSP IPC protocol offers (send/recv) interfaces using
mediatek-mailbox APIs.
We use two mbox channels to implement a request-reply protocol.
Signed-off-by: Allen-KH Cheng <[email protected]>
Signed-off-by: TingHan Shen <[email protected]>
Reviewed-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Curtis Malainey <[email protected]>
Reviewed-by: Tzung-Bi Shih <[email protected]>
Reviewed-by: YC Hung <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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