Francesco Dolcini f5e6958919 platform/surface: aggregator: fix recv_buf() return value ... commit c8820c92caf0770bec976b01fa9e82bb993c5865 upstream. Serdev recv_buf() callback is supposed to return the amount of bytes consumed, therefore an int in between 0 and count. Do not return negative number in case of issue, when ssam_controller_receive_buf() returns ESHUTDOWN just returns 0, e.g. no bytes consumed, this keep the exact same behavior as it was before. This fixes a potential WARN in serdev-ttyport.c:ttyport_receive_buf(). Fixes: c167b9c7e3 ("platform/surface: Add Surface Aggregator subsystem") Cc: stable@vger.kernel.org Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com> Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> Link: https://lore.kernel.org/r/20231128194935.11350-1-francesco@dolcini.it Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-12-13 18:39:20 +01:00
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chrome	platform/chrome: kunit: initialize lock for fake ec_dev	2023-11-28 17:06:56 +00:00
goldfish	platform: goldfish: pipe: Use platform_get_irq() to get the interrupt	2022-03-18 13:55:21 +01:00
loongarch	platform/loongarch: laptop: Fix possible UAF and simplify generic_acpi_laptop_init()	2022-10-29 16:29:31 +08:00
mellanox	platform/mellanox: Check devm_hwmon_device_register_with_groups() return value	2023-12-13 18:39:07 +01:00
mips	MIPS: Loongson-3: fix compile mips cpu_hwmon as module build error.	2022-06-09 22:24:19 +02:00
olpc	platform/olpc: Fix uninitialized data in debugfs write	2022-07-28 20:40:15 +02:00
surface	platform/surface: aggregator: fix recv_buf() return value	2023-12-13 18:39:20 +01:00
x86	platform/x86: wmi: Skip blocks with zero instances	2023-12-13 18:39:06 +01:00
Kconfig	LoongArch: Add ACPI-based generic laptop driver	2022-10-12 16:36:20 +08:00
Makefile	LoongArch: Add ACPI-based generic laptop driver	2022-10-12 16:36:20 +08:00