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Message-Id: <20220613100655.105301-4-krzysztof.kozlowski@linaro.org>
Date: Mon, 13 Jun 2022 12:06:55 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: "James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Alim Akhtar <alim.akhtar@...sung.com>,
Avri Altman <avri.altman@....com>,
Bart Van Assche <bvanassche@....org>,
Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
Doug Gilbert <dgilbert@...erlog.com>,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-ide@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v3 3/3] scsi: ufs: ufshcd: constify pointed data
Constify arrays and pointers to data which is not modified for code
safety.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
drivers/ufs/core/ufshcd-priv.h | 6 ++---
drivers/ufs/core/ufshcd.c | 42 ++++++++++++++++++----------------
include/ufs/ufshcd.h | 6 ++---
3 files changed, 28 insertions(+), 26 deletions(-)
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index ffb01fc6de75..8f67db202d7b 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -215,7 +215,7 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
hba->vops->config_scaling_param(hba, p, data);
}
-extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
+extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
/**
* ufshcd_scsi_to_upiu_lun - maps scsi LUN to UPIU LUN
@@ -234,8 +234,8 @@ static inline u8 ufshcd_scsi_to_upiu_lun(unsigned int scsi_lun)
int __ufshcd_write_ee_control(struct ufs_hba *hba, u32 ee_ctrl_mask);
int ufshcd_write_ee_control(struct ufs_hba *hba);
-int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask, u16 *other_mask,
- u16 set, u16 clr);
+int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask,
+ const u16 *other_mask, u16 set, u16 clr);
static inline int ufshcd_update_ee_drv_mask(struct ufs_hba *hba,
u16 set, u16 clr)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 01fb4bad86be..59f73d67a673 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -175,7 +175,7 @@ enum {
#define ufshcd_clear_eh_in_progress(h) \
((h)->eh_flags &= ~UFSHCD_EH_IN_PROGRESS)
-struct ufs_pm_lvl_states ufs_pm_lvl_states[] = {
+const struct ufs_pm_lvl_states ufs_pm_lvl_states[] = {
[UFS_PM_LVL_0] = {UFS_ACTIVE_PWR_MODE, UIC_LINK_ACTIVE_STATE},
[UFS_PM_LVL_1] = {UFS_ACTIVE_PWR_MODE, UIC_LINK_HIBERN8_STATE},
[UFS_PM_LVL_2] = {UFS_SLEEP_PWR_MODE, UIC_LINK_ACTIVE_STATE},
@@ -363,7 +363,7 @@ static void ufshcd_add_tm_upiu_trace(struct ufs_hba *hba, unsigned int tag,
}
static void ufshcd_add_uic_command_trace(struct ufs_hba *hba,
- struct uic_command *ucmd,
+ const struct uic_command *ucmd,
enum ufs_trace_str_t str_t)
{
u32 cmd;
@@ -443,11 +443,11 @@ static void ufshcd_print_clk_freqs(struct ufs_hba *hba)
}
static void ufshcd_print_evt(struct ufs_hba *hba, u32 id,
- char *err_name)
+ const char *err_name)
{
int i;
bool found = false;
- struct ufs_event_hist *e;
+ const struct ufs_event_hist *e;
if (id >= UFS_EVT_CNT)
return;
@@ -497,7 +497,7 @@ static void ufshcd_print_evt_hist(struct ufs_hba *hba)
static
void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
{
- struct ufshcd_lrb *lrbp;
+ const struct ufshcd_lrb *lrbp;
int prdt_length;
int tag;
@@ -553,7 +553,7 @@ static void ufshcd_print_tmrs(struct ufs_hba *hba, unsigned long bitmap)
static void ufshcd_print_host_state(struct ufs_hba *hba)
{
- struct scsi_device *sdev_ufs = hba->ufs_device_wlun;
+ const struct scsi_device *sdev_ufs = hba->ufs_device_wlun;
dev_err(hba->dev, "UFS Host state=%d\n", hba->ufshcd_state);
dev_err(hba->dev, "outstanding reqs=0x%lx tasks=0x%lx\n",
@@ -1098,7 +1098,7 @@ static bool ufshcd_is_devfreq_scaling_required(struct ufs_hba *hba,
*/
static u32 ufshcd_pending_cmds(struct ufs_hba *hba)
{
- struct scsi_device *sdev;
+ const struct scsi_device *sdev;
u32 pending = 0;
lockdep_assert_held(hba->host->host_lock);
@@ -2069,14 +2069,15 @@ static inline int ufshcd_monitor_opcode2dir(u8 opcode)
static inline bool ufshcd_should_inform_monitor(struct ufs_hba *hba,
struct ufshcd_lrb *lrbp)
{
- struct ufs_hba_monitor *m = &hba->monitor;
+ const struct ufs_hba_monitor *m = &hba->monitor;
return (m->enabled && lrbp && lrbp->cmd &&
(!m->chunk_size || m->chunk_size == lrbp->cmd->sdb.length) &&
ktime_before(hba->monitor.enabled_ts, lrbp->issue_time_stamp));
}
-static void ufshcd_start_monitor(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+static void ufshcd_start_monitor(struct ufs_hba *hba,
+ const struct ufshcd_lrb *lrbp)
{
int dir = ufshcd_monitor_opcode2dir(*lrbp->cmd->cmnd);
unsigned long flags;
@@ -2087,14 +2088,14 @@ static void ufshcd_start_monitor(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
spin_unlock_irqrestore(hba->host->host_lock, flags);
}
-static void ufshcd_update_monitor(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
+static void ufshcd_update_monitor(struct ufs_hba *hba, const struct ufshcd_lrb *lrbp)
{
int dir = ufshcd_monitor_opcode2dir(*lrbp->cmd->cmnd);
unsigned long flags;
spin_lock_irqsave(hba->host->host_lock, flags);
if (dir >= 0 && hba->monitor.nr_queued[dir] > 0) {
- struct request *req = scsi_cmd_to_rq(lrbp->cmd);
+ const struct request *req = scsi_cmd_to_rq(lrbp->cmd);
struct ufs_hba_monitor *m = &hba->monitor;
ktime_t now, inc, lat;
@@ -4899,7 +4900,7 @@ static int ufshcd_get_lu_wp(struct ufs_hba *hba,
*
*/
static inline void ufshcd_get_lu_power_on_wp_status(struct ufs_hba *hba,
- struct scsi_device *sdev)
+ const struct scsi_device *sdev)
{
if (hba->dev_info.f_power_on_wp_en &&
!hba->dev_info.is_lu_power_on_wp) {
@@ -5418,8 +5419,8 @@ int ufshcd_write_ee_control(struct ufs_hba *hba)
return err;
}
-int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask, u16 *other_mask,
- u16 set, u16 clr)
+int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask,
+ const u16 *other_mask, u16 set, u16 clr)
{
u16 new_mask, ee_ctrl_mask;
int err = 0;
@@ -7346,7 +7347,8 @@ static int ufshcd_eh_host_reset_handler(struct scsi_cmnd *cmd)
*
* Returns calculated max ICC level for specific regulator
*/
-static u32 ufshcd_get_max_icc_level(int sup_curr_uA, u32 start_scan, char *buff)
+static u32 ufshcd_get_max_icc_level(int sup_curr_uA, u32 start_scan,
+ const char *buff)
{
int i;
int curr_uA;
@@ -7393,7 +7395,7 @@ static u32 ufshcd_get_max_icc_level(int sup_curr_uA, u32 start_scan, char *buff)
* Returns calculated ICC level
*/
static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba,
- u8 *desc_buf, int len)
+ const u8 *desc_buf, int len)
{
u32 icc_level = 0;
@@ -7543,7 +7545,7 @@ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba)
return ret;
}
-static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
+static void ufshcd_wb_probe(struct ufs_hba *hba, const u8 *desc_buf)
{
struct ufs_dev_info *dev_info = &hba->dev_info;
u8 lun;
@@ -7614,7 +7616,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
hba->caps &= ~UFSHCD_CAP_WB_EN;
}
-static void ufshcd_temp_notif_probe(struct ufs_hba *hba, u8 *desc_buf)
+static void ufshcd_temp_notif_probe(struct ufs_hba *hba, const u8 *desc_buf)
{
struct ufs_dev_info *dev_info = &hba->dev_info;
u32 ext_ufs_feature;
@@ -7848,7 +7850,7 @@ static int ufshcd_quirk_tune_host_pa_tactivate(struct ufs_hba *hba)
u32 granularity, peer_granularity;
u32 pa_tactivate, peer_pa_tactivate;
u32 pa_tactivate_us, peer_pa_tactivate_us;
- u8 gran_to_us_table[] = {1, 4, 8, 16, 32, 100};
+ const u8 gran_to_us_table[] = {1, 4, 8, 16, 32, 100};
ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_GRANULARITY),
&granularity);
@@ -7965,7 +7967,7 @@ struct ufs_ref_clk {
enum ufs_ref_clk_freq val;
};
-static struct ufs_ref_clk ufs_ref_clk_freqs[] = {
+static const struct ufs_ref_clk ufs_ref_clk_freqs[] = {
{19200000, REF_CLK_FREQ_19_2_MHZ},
{26000000, REF_CLK_FREQ_26_MHZ},
{38400000, REF_CLK_FREQ_38_4_MHZ},
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index a92271421718..4f0531af9141 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -1217,14 +1217,14 @@ static inline int ufshcd_vops_phy_initialization(struct ufs_hba *hba)
return 0;
}
-extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
+extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
const char *prefix);
int __ufshcd_write_ee_control(struct ufs_hba *hba, u32 ee_ctrl_mask);
int ufshcd_write_ee_control(struct ufs_hba *hba);
-int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask, u16 *other_mask,
- u16 set, u16 clr);
+int ufshcd_update_ee_control(struct ufs_hba *hba, u16 *mask,
+ const u16 *other_mask, u16 set, u16 clr);
#endif /* End of Header */
--
2.34.1
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