diff options
Diffstat (limited to 'drivers/pci/hotplug/shpchp_hpc.c')
-rw-r--r-- | drivers/pci/hotplug/shpchp_hpc.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c index ae81427..c32a1b1 100644 --- a/drivers/pci/hotplug/shpchp_hpc.c +++ b/drivers/pci/hotplug/shpchp_hpc.c @@ -231,6 +231,7 @@ static spinlock_t list_lock; static irqreturn_t shpc_isr(int IRQ, void *dev_id, struct pt_regs *regs); static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds); +static int hpc_check_cmd_status(struct controller *ctrl); /* This is the interrupt polling timeout function. */ static void int_poll_timeout(unsigned long lphp_ctlr) @@ -303,10 +304,13 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd) int i; DBG_ENTER_ROUTINE - + + mutex_lock(&slot->ctrl->cmd_lock); + if (!php_ctlr) { err("%s: Invalid HPC controller handle!\n", __FUNCTION__); - return -1; + retval = -EINVAL; + goto out; } for (i = 0; i < 10; i++) { @@ -323,7 +327,8 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd) if (cmd_status & 0x1) { /* After 1 sec and and the controller is still busy */ err("%s : Controller is still busy after 1 sec.\n", __FUNCTION__); - return -1; + retval = -EBUSY; + goto out; } ++t_slot; @@ -340,6 +345,17 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd) * Wait for command completion. */ retval = shpc_wait_cmd(slot->ctrl); + if (retval) + goto out; + + cmd_status = hpc_check_cmd_status(slot->ctrl); + if (cmd_status) { + err("%s: Failed to issued command 0x%x (error code = %d)\n", + __FUNCTION__, cmd, cmd_status); + retval = -EIO; + } + out: + mutex_unlock(&slot->ctrl->cmd_lock); DBG_LEAVE_ROUTINE return retval; @@ -1343,7 +1359,6 @@ static struct hpc_ops shpchp_hpc_ops = { .green_led_blink = hpc_set_green_led_blink, .release_ctlr = hpc_release_ctlr, - .check_cmd_status = hpc_check_cmd_status, }; inline static int shpc_indirect_creg_read(struct controller *ctrl, int index, @@ -1455,6 +1470,8 @@ int shpc_init(struct controller * ctrl, struct pci_dev * pdev) dbg("%s: php_ctlr->creg %p\n", __FUNCTION__, php_ctlr->creg); mutex_init(&ctrl->crit_sect); + mutex_init(&ctrl->cmd_lock); + /* Setup wait queue */ init_waitqueue_head(&ctrl->queue); |