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Subject[PATCH 08/20] staging: gasket: apex_clock_gating simplify logic, reduce indentation
Date
From: Todd Poynor <toddpoynor@google.com>

Collapse together two checks and return immediately, avoid conditional
indentation for most of function code.

Reported-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Simon Que <sque@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
drivers/staging/gasket/apex_driver.c | 43 +++++++++++++---------------
1 file changed, 20 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/gasket/apex_driver.c b/drivers/staging/gasket/apex_driver.c
index 3a83c3d4d5561..a01b1f2b827ea 100644
--- a/drivers/staging/gasket/apex_driver.c
+++ b/drivers/staging/gasket/apex_driver.c
@@ -666,33 +666,30 @@ static long apex_clock_gating(struct gasket_dev *gasket_dev, ulong arg)
{
struct apex_gate_clock_ioctl ibuf;

- if (bypass_top_level)
+ if (bypass_top_level || !allow_sw_clock_gating)
return 0;

- if (allow_sw_clock_gating) {
- if (copy_from_user(&ibuf, (void __user *)arg, sizeof(ibuf)))
- return -EFAULT;
+ if (copy_from_user(&ibuf, (void __user *)arg, sizeof(ibuf)))
+ return -EFAULT;

- gasket_log_error(
- gasket_dev, "%s %llu", __func__, ibuf.enable);
+ gasket_log_error(gasket_dev, "%s %llu", __func__, ibuf.enable);

- if (ibuf.enable) {
- /* Quiesce AXI, gate GCB clock. */
- gasket_read_modify_write_32(
- gasket_dev, APEX_BAR_INDEX,
- APEX_BAR2_REG_AXI_QUIESCE, 0x1, 1, 16);
- gasket_read_modify_write_32(
- gasket_dev, APEX_BAR_INDEX,
- APEX_BAR2_REG_GCB_CLOCK_GATE, 0x1, 2, 18);
- } else {
- /* Un-gate GCB clock, un-quiesce AXI. */
- gasket_read_modify_write_32(
- gasket_dev, APEX_BAR_INDEX,
- APEX_BAR2_REG_GCB_CLOCK_GATE, 0x0, 2, 18);
- gasket_read_modify_write_32(
- gasket_dev, APEX_BAR_INDEX,
- APEX_BAR2_REG_AXI_QUIESCE, 0x0, 1, 16);
- }
+ if (ibuf.enable) {
+ /* Quiesce AXI, gate GCB clock. */
+ gasket_read_modify_write_32(
+ gasket_dev, APEX_BAR_INDEX,
+ APEX_BAR2_REG_AXI_QUIESCE, 0x1, 1, 16);
+ gasket_read_modify_write_32(
+ gasket_dev, APEX_BAR_INDEX,
+ APEX_BAR2_REG_GCB_CLOCK_GATE, 0x1, 2, 18);
+ } else {
+ /* Un-gate GCB clock, un-quiesce AXI. */
+ gasket_read_modify_write_32(
+ gasket_dev, APEX_BAR_INDEX,
+ APEX_BAR2_REG_GCB_CLOCK_GATE, 0x0, 2, 18);
+ gasket_read_modify_write_32(
+ gasket_dev, APEX_BAR_INDEX,
+ APEX_BAR2_REG_AXI_QUIESCE, 0x0, 1, 16);
}
return 0;
}
--
2.18.0.233.g985f88cf7e-goog
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