From 0706efd61edfcf958c2c19669aa65c2180ec3ba0 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 19 Nov 2007 18:06:11 +0900 Subject: [PATCH] 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 Signed-off-by: Jeff Garzik --- drivers/ata/pata_jmicron.c | 9 ++++----- 1 file 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 -- 2.20.1