[SCSI] megaraid_sas: remove poll_mode_io code
This code has never worked correctly, doesn't disable interrupts when set as a module parameter, doesn't disable interrupts when set after driver load time in sysfs node, etc. Signed-off-by: Adam Radford <aradford@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
adam radford
James Bottomley
parent
882be7c3be
commit
7895f9c957
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@ -773,7 +773,6 @@ struct megasas_ctrl_info {
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#define MFI_OB_INTR_STATUS_MASK 0x00000002
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#define MFI_POLL_TIMEOUT_SECS 60
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#define MEGASAS_COMPLETION_TIMER_INTERVAL (HZ/10)
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#define MFI_REPLY_1078_MESSAGE_INTERRUPT 0x80000000
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#define MFI_REPLY_GEN2_MESSAGE_INTERRUPT 0x00000001
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@ -1353,7 +1352,6 @@ struct megasas_instance {
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u32 mfiStatus;
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u32 last_seq_num;
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struct timer_list io_completion_timer;
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struct list_head internal_reset_pending_q;
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/* Ptr to hba specific information */
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@ -58,14 +58,6 @@
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#include "megaraid_sas_fusion.h"
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#include "megaraid_sas.h"
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/*
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* poll_mode_io:1- schedule complete completion from q cmd
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*/
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static unsigned int poll_mode_io;
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module_param_named(poll_mode_io, poll_mode_io, int, 0);
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MODULE_PARM_DESC(poll_mode_io,
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"Complete cmds from IO path, (default=0)");
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/*
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* Number of sectors per IO command
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* Will be set in megasas_init_mfi if user does not provide
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@ -1439,11 +1431,6 @@ megasas_build_and_issue_cmd(struct megasas_instance *instance,
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instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
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cmd->frame_count-1, instance->reg_set);
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/*
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* Check if we have pend cmds to be completed
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*/
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if (poll_mode_io && atomic_read(&instance->fw_outstanding))
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tasklet_schedule(&instance->isr_tasklet);
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return 0;
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out_return_cmd:
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@ -3370,47 +3357,6 @@ fail_fw_init:
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return -EINVAL;
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}
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/**
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* megasas_start_timer - Initializes a timer object
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* @instance: Adapter soft state
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* @timer: timer object to be initialized
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* @fn: timer function
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* @interval: time interval between timer function call
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*/
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static inline void
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megasas_start_timer(struct megasas_instance *instance,
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struct timer_list *timer,
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void *fn, unsigned long interval)
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{
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init_timer(timer);
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timer->expires = jiffies + interval;
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timer->data = (unsigned long)instance;
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timer->function = fn;
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add_timer(timer);
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}
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/**
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* megasas_io_completion_timer - Timer fn
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* @instance_addr: Address of adapter soft state
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*
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* Schedules tasklet for cmd completion
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* if poll_mode_io is set
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*/
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static void
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megasas_io_completion_timer(unsigned long instance_addr)
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{
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struct megasas_instance *instance =
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(struct megasas_instance *)instance_addr;
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if (atomic_read(&instance->fw_outstanding))
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tasklet_schedule(&instance->isr_tasklet);
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/* Restart timer */
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if (poll_mode_io)
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mod_timer(&instance->io_completion_timer,
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jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL);
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}
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static u32
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megasas_init_adapter_mfi(struct megasas_instance *instance)
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{
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@ -3638,11 +3584,6 @@ static int megasas_init_fw(struct megasas_instance *instance)
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tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
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(unsigned long)instance);
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/* Initialize the cmd completion timer */
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if (poll_mode_io)
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megasas_start_timer(instance, &instance->io_completion_timer,
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megasas_io_completion_timer,
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MEGASAS_COMPLETION_TIMER_INTERVAL);
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return 0;
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fail_init_adapter:
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@ -4369,9 +4310,6 @@ megasas_suspend(struct pci_dev *pdev, pm_message_t state)
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host = instance->host;
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instance->unload = 1;
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if (poll_mode_io)
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del_timer_sync(&instance->io_completion_timer);
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megasas_flush_cache(instance);
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megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
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@ -4511,12 +4449,6 @@ megasas_resume(struct pci_dev *pdev)
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}
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instance->instancet->enable_intr(instance->reg_set);
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/* Initialize the cmd completion timer */
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if (poll_mode_io)
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megasas_start_timer(instance, &instance->io_completion_timer,
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megasas_io_completion_timer,
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MEGASAS_COMPLETION_TIMER_INTERVAL);
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instance->unload = 0;
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/*
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@ -4570,9 +4502,6 @@ static void __devexit megasas_detach_one(struct pci_dev *pdev)
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host = instance->host;
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fusion = instance->ctrl_context;
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if (poll_mode_io)
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del_timer_sync(&instance->io_completion_timer);
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scsi_remove_host(instance->host);
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megasas_flush_cache(instance);
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megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
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@ -5221,60 +5150,6 @@ megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t coun
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static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
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megasas_sysfs_set_dbg_lvl);
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static ssize_t
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megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
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{
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return sprintf(buf, "%u\n", poll_mode_io);
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}
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static ssize_t
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megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
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const char *buf, size_t count)
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{
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int retval = count;
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int tmp = poll_mode_io;
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int i;
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struct megasas_instance *instance;
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if (sscanf(buf, "%u", &poll_mode_io) < 1) {
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printk(KERN_ERR "megasas: could not set poll_mode_io\n");
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retval = -EINVAL;
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}
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/*
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* Check if poll_mode_io is already set or is same as previous value
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*/
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if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
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goto out;
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if (poll_mode_io) {
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/*
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* Start timers for all adapters
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*/
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for (i = 0; i < megasas_mgmt_info.max_index; i++) {
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instance = megasas_mgmt_info.instance[i];
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if (instance) {
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megasas_start_timer(instance,
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&instance->io_completion_timer,
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megasas_io_completion_timer,
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MEGASAS_COMPLETION_TIMER_INTERVAL);
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}
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}
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} else {
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/*
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* Delete timers for all adapters
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*/
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for (i = 0; i < megasas_mgmt_info.max_index; i++) {
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instance = megasas_mgmt_info.instance[i];
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if (instance)
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del_timer_sync(&instance->io_completion_timer);
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}
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}
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out:
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return retval;
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}
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static void
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megasas_aen_polling(struct work_struct *work)
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{
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@ -5504,11 +5379,6 @@ megasas_aen_polling(struct work_struct *work)
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kfree(ev);
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}
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static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUSR,
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megasas_sysfs_show_poll_mode_io,
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megasas_sysfs_set_poll_mode_io);
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/**
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* megasas_init - Driver load entry point
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*/
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@ -5567,11 +5437,6 @@ static int __init megasas_init(void)
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&driver_attr_dbg_lvl);
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if (rval)
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goto err_dcf_dbg_lvl;
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rval = driver_create_file(&megasas_pci_driver.driver,
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&driver_attr_poll_mode_io);
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if (rval)
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goto err_dcf_poll_mode_io;
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rval = driver_create_file(&megasas_pci_driver.driver,
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&driver_attr_support_device_change);
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if (rval)
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@ -5580,10 +5445,6 @@ static int __init megasas_init(void)
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return rval;
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err_dcf_support_device_change:
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driver_remove_file(&megasas_pci_driver.driver,
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&driver_attr_poll_mode_io);
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err_dcf_poll_mode_io:
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driver_remove_file(&megasas_pci_driver.driver,
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&driver_attr_dbg_lvl);
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err_dcf_dbg_lvl:
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@ -5608,8 +5469,6 @@ err_pcidrv:
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*/
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static void __exit megasas_exit(void)
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{
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driver_remove_file(&megasas_pci_driver.driver,
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&driver_attr_poll_mode_io);
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driver_remove_file(&megasas_pci_driver.driver,
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&driver_attr_dbg_lvl);
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driver_remove_file(&megasas_pci_driver.driver,
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