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| author | Tejun Heo <htejun@gmail.com> | 2007-11-19 10:06:11 +0100 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-11-24 01:23:55 +0100 |
| commit | 0706efd61edfcf958c2c19669aa65c2180ec3ba0 (patch) | |
| tree | 9accc045719661b364158cd1c3ca51bcad035678 /drivers/ata/pata_jmicron.c | |
| parent | pata_sil680: kill bogus reset code (take 2) (diff) | |
| download | linux-0706efd61edfcf958c2c19669aa65c2180ec3ba0.tar.xz linux-0706efd61edfcf958c2c19669aa65c2180ec3ba0.zip | |
pata_jmicron: fix disabled port handling in jmicron_pre_reset()
There are two bugs in disabled port handling.
* test in PORT_PATA0 is reversed
* ->prereset should return -ENOENT for disabled ports not 0
The first bug makes the PATA channel considered disabled but the
second bug saves the day by returning 0. The net result is that cable
is always left at ATA_CBL_UNKNOWN. This results in false 80c
configuration and thus transfer errors.
This patch fixes both bugs.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_jmicron.c')
| -rw-r--r-- | drivers/ata/pata_jmicron.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c index 225a7223a726..5b8174d94067 100644 --- a/drivers/ata/pata_jmicron.c +++ b/drivers/ata/pata_jmicron.c @@ -80,11 +80,10 @@ static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) * actually do our cable checking etc. Thankfully we don't need * to do the plumbing for other cases. */ - switch (port_map[port]) - { + switch (port_map[port]) { case PORT_PATA0: - if (control & (1 << 5)) - return 0; + if ((control & (1 << 5)) == 0) + return -ENOENT; if (control & (1 << 3)) /* 40/80 pin primary */ ap->cbl = ATA_CBL_PATA40; else @@ -93,7 +92,7 @@ static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) case PORT_PATA1: /* Bit 21 is set if the port is enabled */ if ((control5 & (1 << 21)) == 0) - return 0; + return -ENOENT; if (control5 & (1 << 19)) /* 40/80 pin secondary */ ap->cbl = ATA_CBL_PATA40; else |