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[SCSI] aic79xx, aic7xxx: Fix incorrect width setting 

Wide transfers are required for every setting of PPR apart from QAS.
It seems the DV code starts at the minimum, which turns on DT and Wide
regardless of the setting of max_width.  Redo the PPR and period
setting routines to respect max_width (i.e. start at period = 10 if it
is zero).

This fixes bugzilla 8366

Acked-by: "Freels, James D." <freelsjd@ornl.gov>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley 2007-07-26 17:13:10 -04:00 committed by James Bottomley
parent 281afe1947
commit 0f82cb9211
2 changed files with 21 additions and 13 deletions
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23
drivers/scsi/aic7xxx/aic79xx_osm.c
View File

@ -2284,9 +2284,12 @@ static void ahd_linux_set_period(struct scsi_target *starget, int period)
if (period < 8)
period = 8;
if (period < 10) {
ppr_options |= MSG_EXT_PPR_DT_REQ;
if (period == 8)
ppr_options |= MSG_EXT_PPR_IU_REQ;
if (spi_max_width(starget)) {
ppr_options |= MSG_EXT_PPR_DT_REQ;
if (period == 8)
ppr_options |= MSG_EXT_PPR_IU_REQ;
} else
period = 10;
}
dt = ppr_options & MSG_EXT_PPR_DT_REQ;
@ -2365,7 +2368,7 @@ static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
printf("%s: %s DT\n", ahd_name(ahd),
dt ? "enabling" : "disabling");
#endif
if (dt) {
if (dt && spi_max_width(starget)) {
ppr_options |= MSG_EXT_PPR_DT_REQ;
if (!width)
ahd_linux_set_width(starget, 1);
@ -2447,7 +2450,7 @@ static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
iu ? "enabling" : "disabling");
#endif
if (iu) {
if (iu && spi_max_width(starget)) {
ppr_options |= MSG_EXT_PPR_IU_REQ;
ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
}
@ -2487,7 +2490,7 @@ static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
rdstrm ? "enabling" : "disabling");
#endif
if (rdstrm)
if (rdstrm && spi_max_width(starget))
ppr_options |= MSG_EXT_PPR_RD_STRM;
ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
@ -2523,7 +2526,7 @@ static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
wrflow ? "enabling" : "disabling");
#endif
if (wrflow)
if (wrflow && spi_max_width(starget))
ppr_options |= MSG_EXT_PPR_WR_FLOW;
ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
@ -2567,7 +2570,7 @@ static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
rti ? "enabling" : "disabling");
#endif
if (rti)
if (rti && spi_max_width(starget))
ppr_options |= MSG_EXT_PPR_RTI;
ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
@ -2603,7 +2606,7 @@ static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
pcomp ? "Enable" : "Disable");
#endif
if (pcomp) {
if (pcomp && spi_max_width(starget)) {
uint8_t precomp;
if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
@ -2647,7 +2650,7 @@ static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
unsigned long flags;
if (hold)
if (hold && spi_max_width(starget))
ppr_options |= MSG_EXT_PPR_HOLD_MCS;
ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,

11
drivers/scsi/aic7xxx/aic7xxx_osm.c
View File

@ -2317,8 +2317,13 @@ static void ahc_linux_set_period(struct scsi_target *starget, int period)
if (period < 9)
period = 9; /* 12.5ns is our minimum */
if (period == 9)
ppr_options |= MSG_EXT_PPR_DT_REQ;
if (period == 9) {
if (spi_max_width(starget))
ppr_options |= MSG_EXT_PPR_DT_REQ;
else
/* need wide for DT and need DT for 12.5 ns */
period = 10;
}
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
@ -2381,7 +2386,7 @@ static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
unsigned long flags;
struct ahc_syncrate *syncrate;
if (dt) {
if (dt && spi_max_width(starget)) {
ppr_options |= MSG_EXT_PPR_DT_REQ;
if (!width)
ahc_linux_set_width(starget, 1);