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authorLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 08:53:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 08:53:02 -0700
commit132ea5e9aa9ce13f62ba45db8e43ec887d1106e9 (patch)
tree417d93c83ccaa205efab507df56fc985242ba0ae /drivers/ata/ahci.c
parent0e26da0f2200a2fb51844aaa43e365ea9dd5a93d (diff)
parentcae5a29d3c4ec7c4214966021c9ee827e66bd67b (diff)
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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: sata_mv: shorten register names sata_mv: workaround errata SATA#13 sata_mv: cosmetic renames sata_mv: workaround errata SATA#26 sata_mv: workaround errata PCI#7 sata_mv: replace 0x1f with ATA_PIO4 (v2) sata_mv: fix irq mask races sata_mv: revert SoC irq breakage libata: ahci enclosure management bios workaround ata: Add TRIM infrastructure ata_piix: VGN-BX297XP wants the controller power up on suspend libata: Remove some redundant casts from pata_octeon_cf.c pata_artop: typo
Diffstat (limited to 'drivers/ata/ahci.c')
-rw-r--r--drivers/ata/ahci.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index f75dac5..57be6be 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -78,6 +78,7 @@ static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
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,
@@ -1115,6 +1116,8 @@ static void ahci_start_port(struct ata_port *ap)
struct ahci_port_priv *pp = ap->private_data;
struct ata_link *link;
struct ahci_em_priv *emp;
+ ssize_t rc;
+ int i;
/* enable FIS reception */
ahci_start_fis_rx(ap);
@@ -1126,7 +1129,17 @@ static void ahci_start_port(struct ata_port *ap)
if (ap->flags & ATA_FLAG_EM) {
ata_for_each_link(link, ap, EDGE) {
emp = &pp->em_priv[link->pmp];
- ahci_transmit_led_message(ap, emp->led_state, 4);
+
+ /* EM Transmit bit maybe busy during init */
+ for (i = 0; i < MAX_RETRY; i++) {
+ rc = ahci_transmit_led_message(ap,
+ emp->led_state,
+ 4);
+ if (rc == -EBUSY)
+ udelay(100);
+ else
+ break;
+ }
}
}
@@ -1331,7 +1344,7 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
em_ctl = readl(mmio + HOST_EM_CTL);
if (em_ctl & EM_CTL_TM) {
spin_unlock_irqrestore(ap->lock, flags);
- return -EINVAL;
+ return -EBUSY;
}
/*