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| author | Tejun Heo <tj@kernel.org> | 2009-05-12 10:57:41 +0900 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-06-10 07:50:17 -0400 |
| commit | d50ce07d6fd8a422757a231f9d7293cbddeaec31 (patch) | |
| tree | 27fdf48eb56e171a60da15156162758fedf84021 /drivers/ata | |
| parent | 437681800bdaa9feb58cf943dfbbd239c21d3705 (diff) | |
| download | linux-d50ce07d6fd8a422757a231f9d7293cbddeaec31.tar.gz linux-d50ce07d6fd8a422757a231f9d7293cbddeaec31.tar.bz2 linux-d50ce07d6fd8a422757a231f9d7293cbddeaec31.zip | |
ahci: misc cleanups for EM stuff
Make the following EM related cleanups.
* Use msleep(1) instead of udelay(100) and reduce retry count to 5.
* s/MAX_SLOTS/EM_MAX_SLOTS/, s/MAX_RETRY/EM_MAX_RETRY/
* Make EM constants enums as suggested by Jeff.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index cd832cb69492..2141a31f176b 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -77,8 +77,6 @@ static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, size_t size); static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, ssize_t size); -#define MAX_SLOTS 8 -#define MAX_RETRY 15 enum { AHCI_PCI_BAR = 5, @@ -231,6 +229,10 @@ enum { ICH_MAP = 0x90, /* ICH MAP register */ + /* em constants */ + EM_MAX_SLOTS = 8, + EM_MAX_RETRY = 5, + /* em_ctl bits */ EM_CTL_RST = (1 << 9), /* Reset */ EM_CTL_TM = (1 << 8), /* Transmit Message */ @@ -282,8 +284,8 @@ struct ahci_port_priv { unsigned int ncq_saw_dmas:1; unsigned int ncq_saw_sdb:1; u32 intr_mask; /* interrupts to enable */ - struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info - * per PM slot */ + /* enclosure management info per PM slot */ + struct ahci_em_priv em_priv[EM_MAX_SLOTS]; }; static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); @@ -1140,12 +1142,12 @@ static void ahci_start_port(struct ata_port *ap) emp = &pp->em_priv[link->pmp]; /* EM Transmit bit maybe busy during init */ - for (i = 0; i < MAX_RETRY; i++) { + for (i = 0; i < EM_MAX_RETRY; i++) { rc = ahci_transmit_led_message(ap, emp->led_state, 4); if (rc == -EBUSY) - udelay(100); + msleep(1); else break; } @@ -1339,7 +1341,7 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; - if (pmp < MAX_SLOTS) + if (pmp < EM_MAX_SLOTS) emp = &pp->em_priv[pmp]; else return -EINVAL; @@ -1407,7 +1409,7 @@ static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, /* get the slot number from the message */ pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; - if (pmp < MAX_SLOTS) + if (pmp < EM_MAX_SLOTS) emp = &pp->em_priv[pmp]; else return -EINVAL; |