From: Tejun Heo Date: Fri, 31 Mar 2006 16:38:18 +0000 (+0900) Subject: [PATCH] libata: preserve SATA SPD setting over hard resets X-Git-Tag: v2.6.18-rc1~1079^2~158 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=852ee16a914fb3ada2f81e222677c04defc2f15f;p=karo-tx-linux.git [PATCH] libata: preserve SATA SPD setting over hard resets Don't overwrite SPD setting during hard reset. This change has the (intended) side effect of honoring the BIOS configuration. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 061b0b6544cc..3acf56200d87 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -2132,9 +2132,11 @@ err_out: static int sata_phy_resume(struct ata_port *ap) { unsigned long timeout = jiffies + (HZ * 5); - u32 sstatus; + u32 scontrol, sstatus; - scr_write_flush(ap, SCR_CONTROL, 0x300); + scontrol = scr_read(ap, SCR_CONTROL); + scontrol = (scontrol & 0x0f0) | 0x300; + scr_write_flush(ap, SCR_CONTROL, scontrol); /* Wait for phy to become ready, if necessary. */ do { @@ -2247,10 +2249,14 @@ int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) */ int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) { + u32 scontrol; + DPRINTK("ENTER\n"); /* Issue phy wake/reset */ - scr_write_flush(ap, SCR_CONTROL, 0x301); + scontrol = scr_read(ap, SCR_CONTROL); + scontrol = (scontrol & 0x0f0) | 0x301; + scr_write_flush(ap, SCR_CONTROL, scontrol); /* * Couldn't find anything in SATA I/II specs, but AHCI-1.1