[PATCH v3 4/5] platform/x86: intel_scu_ipc: Convert to check for errors first

Andy Shevchenko
2024-10-21T13:37:14Z

Convert to use usual pattern, i.e. check for errors first. This makes
code less indented and easier to read after all.

Tested-by: Ferry Toth <fntoth@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/platform/x86/intel_scu_ipc.c | 37 ++++++++++++++--------------
1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index 9829d4145c58..2d25a0a86143 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -317,12 +317,15 @@ static int pwr_reg_rdwr(struct intel_scu_ipc_dev *scu, u16 *addr, u8 *data,
}

err = intel_scu_ipc_check_status(scu);
- if (!err) { /* Read rbuf */
- for (nc = 0, offset = 0; nc < 4; nc++, offset += 4)
- wbuf[nc] = ipc_data_readl(scu, offset);
- memcpy(data, wbuf, count);
- }
- return err;
+ if (err)
+ return err;
+
+ /* Read rbuf */
+ for (nc = 0, offset = 0; nc < 4; nc++, offset += 4)
+ wbuf[nc] = ipc_data_readl(scu, offset);
+ memcpy(data, wbuf, count);
+
+ return 0;
}

/**
@@ -480,7 +483,7 @@ int intel_scu_ipc_dev_command_with_size(struct intel_scu_ipc_dev *scu, int cmd,
{
size_t outbuflen = DIV_ROUND_UP(outlen, sizeof(u32));
size_t inbuflen = DIV_ROUND_UP(inlen, sizeof(u32));
- u32 cmdval, inbuf[4] = {};
+ u32 cmdval, inbuf[4] = {}, outbuf[4] = {};
int i, err;

if (inbuflen > 4 || outbuflen > 4)
@@ -499,19 +502,17 @@ int intel_scu_ipc_dev_command_with_size(struct intel_scu_ipc_dev *scu, int cmd,
cmdval = (size << 16) | (sub << 12) | cmd;
ipc_command(scu, cmdval);
err = intel_scu_ipc_check_status(scu);
-
- if (!err) {
- u32 outbuf[4] = {};
-
- for (i = 0; i < outbuflen; i++)
- outbuf[i] = ipc_data_readl(scu, 4 * i);
-
- memcpy(out, outbuf, outlen);
+ if (err) {
+ dev_err(&scu->dev, "IPC command %#x failed with %d\n", cmdval, err);
+ return err;
}

- if (err)
- dev_err(&scu->dev, "IPC command %#x failed with %d\n", cmdval, err);
- return err;
+ for (i = 0; i < outbuflen; i++)
+ outbuf[i] = ipc_data_readl(scu, 4 * i);
+
+ memcpy(out, outbuf, outlen);
+
+ return 0;
}
EXPORT_SYMBOL(intel_scu_ipc_dev_command_with_size);

--
2.43.0.rc1.1336.g36b5255a03ac