Re: [RFC v3 4/7] platform: x86: Add generic Intel IPC driver

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Hi,


On 10/01/2017 07:59 AM, Andy Shevchenko wrote:
On Tue, Sep 5, 2017 at 8:37 AM,
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>

Currently intel_scu_ipc.c, intel_pmc_ipc.c and intel_punit_ipc.c
redundantly implements the same IPC features and has lot of code
duplication between them. This driver addresses this issue by grouping
the common IPC functionalities under the same driver.
+static const char *ipc_dev_err_string(struct intel_ipc_dev *ipc_dev,
+       int error)
+{
+       switch (error) {
+       case IPC_DEV_ERR_NONE:
+               return "No error";
+       case IPC_DEV_ERR_CMD_NOT_SUPPORTED:
+               return "Command not-supported/Invalid";
+       case IPC_DEV_ERR_CMD_NOT_SERVICED:
+               return "Command not-serviced/Invalid param";
+       case IPC_DEV_ERR_UNABLE_TO_SERVICE:
+               return "Unable-to-service/Cmd-timeout";
+       case IPC_DEV_ERR_CMD_INVALID:
+               return "Command-invalid/Cmd-locked";
+       case IPC_DEV_ERR_CMD_FAILED:
+               return "Command-failed/Invalid-VR-id";
+       case IPC_DEV_ERR_EMSECURITY:
+               return "Invalid Battery/VR-Error";
+       case IPC_DEV_ERR_UNSIGNEDKERNEL:
+               return "Unsigned kernel";
+       default:
+               return "Unknown Command";
+       };
+}
Since it's continuous list you can define an array of messages like

const char * const *errors = {
  [..._ERR_...] = "",
  ...

};

Also you can use enum in the header and define _ERR_MAX there.
Thus, code would be transformed to

if (error < _ERR_MAX)
  return errors[error];

return "Unknown Command";
Thanks will fix it in next version.


--
Sathyanarayanan Kuppuswamy
Linux kernel developer




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