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ahci: handle COMINIT received during spin-up 

Some Intel SSDs can send a COMINIT after the initial COMRESET. This causes
the link to go down and we need to re-initialize the link.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Rob Herring 2013-02-11 18:02:00 +01:00 committed by Sascha Hauer
parent 650e2daa9f
commit a3f74d928c
1 changed files with 9 additions and 2 deletions
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11
drivers/ata/ahci.c
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@ -385,14 +385,21 @@ static int ahci_init_port(struct ahci_port *ahci_port)
ahci_port_info(ahci_port, "Spinning up device...\n");
ret = wait_on_timeout(WAIT_SPINUP,
(readl(port_mmio + PORT_TFDATA) &
(ATA_STATUS_BUSY | ATA_STATUS_DRQ)) == 0);
((readl(port_mmio + PORT_TFDATA) &
(ATA_STATUS_BUSY | ATA_STATUS_DRQ)) == 0)
|| !((readl(port_mmio + PORT_SCR_STAT) & 0xf) == 1));
if (ret) {
ahci_port_info(ahci_port, "timeout.\n");
ret = -ENODEV;
goto err_init;
}
if ((readl(port_mmio + PORT_SCR_STAT) & 0xf) == 1) {
ahci_port_info(ahci_port, "down.\n");
ret = -ENODEV;
goto err_init;
}
ahci_port_info(ahci_port, "ok.\n");
val = ahci_port_read(ahci_port, PORT_SCR_ERR);