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[libata] AHCI: fix newly introduced host-reset bug

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The recent fix to host reset introduced a problem, whereby AHCI-enable
bit would be cleared upon reset, if it was not asserted prior to reset.

Unconditionally enable AHCI-enable bit.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jeff Garzik 2007-10-29 10:43:55 -04:00
parent 360737a982
commit ab6fc95f60
1 changed files with 4 additions and 2 deletions
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6
drivers/ata/ahci.c
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@ -898,8 +898,10 @@ static int ahci_reset_controller(struct ata_host *host)
* AHCI-specific, such as HOST_RESET. * AHCI-specific, such as HOST_RESET.
*/ */
tmp = readl(mmio + HOST_CTL); tmp = readl(mmio + HOST_CTL);
if (!(tmp & HOST_AHCI_EN)) if (!(tmp & HOST_AHCI_EN)) {
writel(tmp | HOST_AHCI_EN, mmio + HOST_CTL); tmp |= HOST_AHCI_EN;
writel(tmp, mmio + HOST_CTL);
}
/* global controller reset */ /* global controller reset */
if ((tmp & HOST_RESET) == 0) { if ((tmp & HOST_RESET) == 0) {