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[SCSI] aic79xx: set precompensation 

aic79xx has a special 'iocell' chip which handles the precompensation.
If it's set via DV we should make sure to set the chip correctly, too.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Hannes Reinecke 2006-10-23 15:24:23 +02:00 committed by James Bottomley
parent 8883c1f182
commit 843822ad63
1 changed files with 15 additions and 1 deletions
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16
drivers/scsi/aic7xxx/aic79xx_osm.c
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@ -2636,8 +2636,22 @@ static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
pcomp ? "Enable" : "Disable");
#endif
if (pcomp)
if (pcomp) {
uint8_t precomp;
if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
struct ahd_linux_iocell_opts *iocell_opts;
iocell_opts = &aic79xx_iocell_info[ahd->unit];
precomp = iocell_opts->precomp;
} else {
precomp = AIC79XX_DEFAULT_PRECOMP;
}
ppr_options |= MSG_EXT_PPR_PCOMP_EN;
AHD_SET_PRECOMP(ahd, precomp);
} else {
AHD_SET_PRECOMP(ahd, 0);
}
ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);