From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: martin.petersen@oracle.com, jejb@linux.ibm.com,
andersson@kernel.org, vkoul@kernel.org,
krzysztof.kozlowski+dt@linaro.org
Cc: konrad.dybcio@somainline.org, robh+dt@kernel.org,
quic_cang@quicinc.com, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org,
dmitry.baryshkov@linaro.org, ahalaney@redhat.com,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH v2 08/15] scsi: ufs: ufs-qcom: Remove un-necessary goto statements
Date: Mon, 31 Oct 2022 23:32:10 +0530 [thread overview]
Message-ID: <20221031180217.32512-9-manivannan.sadhasivam@linaro.org> (raw)
In-Reply-To: <20221031180217.32512-1-manivannan.sadhasivam@linaro.org>
goto in error path is useful if the function needs to do cleanup other
than returning the error code. But in this driver, goto statements are
used for just returning the error code in many places. This really
makes it hard to read the code.
So let's get rid of those goto statements and just return the error code
directly.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/ufs/host/ufs-qcom.c | 100 +++++++++++++++---------------------
1 file changed, 41 insertions(+), 59 deletions(-)
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 8ad1415e10b6..7cd996ac180b 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -110,7 +110,7 @@ static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
{
- int err = 0;
+ int err;
struct device *dev = host->hba->dev;
if (host->is_lane_clks_enabled)
@@ -119,7 +119,7 @@ static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
err = ufs_qcom_host_clk_enable(dev, "rx_lane0_sync_clk",
host->rx_l0_sync_clk);
if (err)
- goto out;
+ return err;
err = ufs_qcom_host_clk_enable(dev, "tx_lane0_sync_clk",
host->tx_l0_sync_clk);
@@ -137,7 +137,8 @@ static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
goto disable_rx_l1;
host->is_lane_clks_enabled = true;
- goto out;
+
+ return 0;
disable_rx_l1:
clk_disable_unprepare(host->rx_l1_sync_clk);
@@ -145,7 +146,7 @@ static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
clk_disable_unprepare(host->tx_l0_sync_clk);
disable_rx_l0:
clk_disable_unprepare(host->rx_l0_sync_clk);
-out:
+
return err;
}
@@ -160,25 +161,25 @@ static int ufs_qcom_init_lane_clks(struct ufs_qcom_host *host)
err = ufs_qcom_host_clk_get(dev, "rx_lane0_sync_clk",
&host->rx_l0_sync_clk, false);
if (err)
- goto out;
+ return err;
err = ufs_qcom_host_clk_get(dev, "tx_lane0_sync_clk",
&host->tx_l0_sync_clk, false);
if (err)
- goto out;
+ return err;
/* In case of single lane per direction, don't read lane1 clocks */
if (host->hba->lanes_per_direction > 1) {
err = ufs_qcom_host_clk_get(dev, "rx_lane1_sync_clk",
&host->rx_l1_sync_clk, false);
if (err)
- goto out;
+ return err;
err = ufs_qcom_host_clk_get(dev, "tx_lane1_sync_clk",
&host->tx_l1_sync_clk, true);
}
-out:
- return err;
+
+ return 0;
}
static int ufs_qcom_check_hibern8(struct ufs_hba *hba)
@@ -241,7 +242,7 @@ static int ufs_qcom_host_reset(struct ufs_hba *hba)
if (!host->core_reset) {
dev_warn(hba->dev, "%s: reset control not set\n", __func__);
- goto out;
+ return 0;
}
reenable_intr = hba->is_irq_enabled;
@@ -252,7 +253,7 @@ static int ufs_qcom_host_reset(struct ufs_hba *hba)
if (ret) {
dev_err(hba->dev, "%s: core_reset assert failed, err = %d\n",
__func__, ret);
- goto out;
+ return ret;
}
/*
@@ -274,15 +275,14 @@ static int ufs_qcom_host_reset(struct ufs_hba *hba)
hba->is_irq_enabled = true;
}
-out:
- return ret;
+ return 0;
}
static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct phy *phy = host->generic_phy;
- int ret = 0;
+ int ret;
bool is_rate_B = UFS_QCOM_LIMIT_HS_RATE == PA_HS_MODE_B;
/* Reset UFS Host Controller and PHY */
@@ -299,7 +299,7 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
if (ret) {
dev_err(hba->dev, "%s: phy init failed, ret = %d\n",
__func__, ret);
- goto out;
+ return ret;
}
/* power on phy - start serdes and phy's power and clocks */
@@ -316,7 +316,7 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
out_disable_phy:
phy_exit(phy);
-out:
+
return ret;
}
@@ -374,7 +374,6 @@ static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba,
static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
u32 hs, u32 rate, bool update_link_startup_timer)
{
- int ret = 0;
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_clk_info *clki;
u32 core_clk_period_in_ns;
@@ -409,11 +408,11 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
* Aggregation logic.
*/
if (ufs_qcom_cap_qunipro(host) && !ufshcd_is_intr_aggr_allowed(hba))
- goto out;
+ return 0;
if (gear == 0) {
dev_err(hba->dev, "%s: invalid gear = %d\n", __func__, gear);
- goto out_error;
+ return -EINVAL;
}
list_for_each_entry(clki, &hba->clk_list_head, list) {
@@ -436,7 +435,7 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
}
if (ufs_qcom_cap_qunipro(host))
- goto out;
+ return 0;
core_clk_period_in_ns = NSEC_PER_SEC / core_clk_rate;
core_clk_period_in_ns <<= OFFSET_CLK_NS_REG;
@@ -451,7 +450,7 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(hs_fr_table_rA));
- goto out_error;
+ return -EINVAL;
}
tx_clk_cycles_per_us = hs_fr_table_rA[gear-1][1];
} else if (rate == PA_HS_MODE_B) {
@@ -460,13 +459,13 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(hs_fr_table_rB));
- goto out_error;
+ return -EINVAL;
}
tx_clk_cycles_per_us = hs_fr_table_rB[gear-1][1];
} else {
dev_err(hba->dev, "%s: invalid rate = %d\n",
__func__, rate);
- goto out_error;
+ return -EINVAL;
}
break;
case SLOWAUTO_MODE:
@@ -476,14 +475,14 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(pwm_fr_table));
- goto out_error;
+ return -EINVAL;
}
tx_clk_cycles_per_us = pwm_fr_table[gear-1][1];
break;
case UNCHANGED:
default:
dev_err(hba->dev, "%s: invalid mode = %d\n", __func__, hs);
- goto out_error;
+ return -EINVAL;
}
if (ufshcd_readl(hba, REG_UFS_TX_SYMBOL_CLK_NS_US) !=
@@ -507,12 +506,8 @@ static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
*/
mb();
}
- goto out;
-out_error:
- ret = -EINVAL;
-out:
- return ret;
+ return 0;
}
static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
@@ -527,8 +522,7 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
0, true)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n",
__func__);
- err = -EINVAL;
- goto out;
+ return -EINVAL;
}
if (ufs_qcom_cap_qunipro(host))
@@ -554,7 +548,6 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
break;
}
-out:
return err;
}
@@ -691,8 +684,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
if (!dev_req_params) {
pr_err("%s: incoming dev_req_params is NULL\n", __func__);
- ret = -EINVAL;
- goto out;
+ return -EINVAL;
}
switch (status) {
@@ -720,7 +712,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
if (ret) {
pr_err("%s: failed to determine capabilities\n",
__func__);
- goto out;
+ return ret;
}
/* enable the device ref clock before changing to HS mode */
@@ -761,7 +753,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
ret = -EINVAL;
break;
}
-out:
+
return ret;
}
@@ -773,14 +765,11 @@ static int ufs_qcom_quirk_host_pa_saveconfigtime(struct ufs_hba *hba)
err = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
&pa_vs_config_reg1);
if (err)
- goto out;
+ return err;
/* Allow extension of MSB bits of PA_SaveConfigTime attribute */
- err = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
+ return ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
(pa_vs_config_reg1 | (1 << 12)));
-
-out:
- return err;
}
static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
@@ -957,9 +946,8 @@ static int ufs_qcom_init(struct ufs_hba *hba)
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
if (!host) {
- err = -ENOMEM;
dev_err(dev, "%s: no memory for qcom ufs host\n", __func__);
- goto out;
+ return -ENOMEM;
}
/* Make a two way bind between the qcom host and the hba */
@@ -980,10 +968,8 @@ static int ufs_qcom_init(struct ufs_hba *hba)
host->rcdev.owner = dev->driver->owner;
host->rcdev.nr_resets = 1;
err = devm_reset_controller_register(dev, &host->rcdev);
- if (err) {
+ if (err)
dev_warn(dev, "Failed to register reset controller\n");
- err = 0;
- }
if (!has_acpi_companion(dev)) {
host->generic_phy = devm_phy_get(dev, "ufsphy");
@@ -1049,17 +1035,16 @@ static int ufs_qcom_init(struct ufs_hba *hba)
host->dbg_print_en |= UFS_QCOM_DEFAULT_DBG_PRINT_EN;
ufs_qcom_get_default_testbus_cfg(host);
err = ufs_qcom_testbus_config(host);
- if (err) {
+ if (err)
+ /* Failure is non-fatal */
dev_warn(dev, "%s: failed to configure the testbus %d\n",
__func__, err);
- err = 0;
- }
- goto out;
+ return 0;
out_variant_clear:
ufshcd_set_variant(hba, NULL);
-out:
+
return err;
}
@@ -1085,7 +1070,7 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
&core_clk_ctrl_reg);
if (err)
- goto out;
+ return err;
core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK;
core_clk_ctrl_reg |= clk_cycles;
@@ -1093,11 +1078,9 @@ static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
/* Clear CORE_CLK_DIV_EN */
core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;
- err = ufshcd_dme_set(hba,
+ return ufshcd_dme_set(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
core_clk_ctrl_reg);
-out:
- return err;
}
static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
@@ -1180,7 +1163,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
if (err || !dev_req_params) {
ufshcd_uic_hibern8_exit(hba);
- goto out;
+ return err;
}
ufs_qcom_cfg_timers(hba,
@@ -1191,8 +1174,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
ufshcd_uic_hibern8_exit(hba);
}
-out:
- return err;
+ return 0;
}
static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba,
--
2.25.1
next prev parent reply other threads:[~2022-10-31 18:04 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 18:02 [PATCH v2 00/15] ufs: qcom: Add HS-G4 support Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 01/15] phy: qcom-qmp-ufs: Move register settings to qmp_phy_cfg_tables struct Manivannan Sadhasivam
2022-11-11 6:57 ` Vinod Koul
2022-10-31 18:02 ` [PATCH v2 02/15] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode Manivannan Sadhasivam
2022-11-11 7:01 ` Vinod Koul
2022-11-22 16:21 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 03/15] phy: qcom-qmp-ufs: Add support for configuring PHY in HS G4 mode Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 04/15] phy: qcom-qmp-ufs: Add HS G4 mode support to SM8250 SoC Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 05/15] phy: qcom-qmp-ufs: Move HS Rate B register setting to tables_hs_b Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 06/15] dt-bindings: ufs: Add "max-device-gear" property for UFS device Manivannan Sadhasivam
2022-11-02 16:29 ` Rob Herring
2022-11-02 19:09 ` Krzysztof Kozlowski
2022-11-03 12:28 ` Manivannan Sadhasivam
2022-11-03 15:23 ` Krzysztof Kozlowski
2022-11-22 16:22 ` Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 07/15] arm64: dts: qcom: qrb5165-rb5: Add max-device-gear property to UFS node Manivannan Sadhasivam
2022-10-31 18:02 ` Manivannan Sadhasivam [this message]
2022-10-31 18:02 ` [PATCH v2 09/15] scsi: ufs: ufs-qcom: Remove un-necessary WARN_ON() Manivannan Sadhasivam
2022-10-31 20:01 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 10/15] scsi: ufs: ufs-qcom: Use bitfields where appropriate Manivannan Sadhasivam
2022-10-31 18:02 ` [PATCH v2 11/15] scsi: ufs: ufs-qcom: Use dev_err_probe() for printing probe error Manivannan Sadhasivam
2022-10-31 20:05 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 12/15] scsi: ufs: ufs-qcom: Fix the Qcom register name for offset 0xD0 Manivannan Sadhasivam
2022-11-01 15:12 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 13/15] scsi: ufs: ufs-qcom: Factor out the logic finding the HS Gear Manivannan Sadhasivam
2022-10-31 20:31 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 14/15] scsi: ufs: ufs-qcom: Add support for finding HS gear on new UFS versions Manivannan Sadhasivam
2022-10-31 20:52 ` Andrew Halaney
2022-10-31 18:02 ` [PATCH v2 15/15] MAINTAINERS: Add myself as the maintainer for Qcom UFS driver Manivannan Sadhasivam
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