linux-kernel - Re: 2.6.23-rc6-mm1: Build failure on ppc64 drivers/ata/pata

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Message-ID: <alpine.LFD.0.999.0709220816170.14412@enigma.security.iitk.ac.in>
Date:	Sat, 22 Sep 2007 08:20:09 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Mel Gorman <mel@...net.ie>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jeff@...zik.org, linux-ide@...r.kernel.org,
	linuxppc-dev@...abs.org, kamalesh@...ux.vnet.ibm.com
Subject: Re: 2.6.23-rc6-mm1: Build failure on ppc64 drivers/ata/pata_scc.c

Hi,


On Thu, 20 Sep 2007, Alan Cox wrote:
> 
> On Thu, 20 Sep 2007 14:13:15 +0100
> mel@...net.ie (Mel Gorman) wrote:
> 
> > PPC64 building allmodconfig fails to compile drivers/ata/pata_scc.c . It
> > doesn't show up on other arches because this driver is specific to the
> > architecture.
> > 
> > drivers/ata/pata_scc.c: In function `scc_bmdma_status'
> 
> Its not been updated to match the libata core changes. Try something like
> this. Whoever is maintaining it should also remove the prereset cable handling
> code and use the proper cable detect method.

It appears you forgot to fix scc_std_softreset() and one of its callsites
in scc_bdma_stop(). A complete patch is attempted below -- please review.


[PATCH -mm] pata_scc: Keep up with libata core API changes

Little fixlets, that the build started erroring / warning about:

drivers/ata/pata_scc.c: In function 'scc_bmdma_status':
drivers/ata/pata_scc.c:734: error: structure has no member named 'active_tag'
drivers/ata/pata_scc.c: In function 'scc_pata_prereset':
drivers/ata/pata_scc.c:866: warning: passing arg 1 of 'ata_std_prereset' from incompatible pointer type
drivers/ata/pata_scc.c: In function 'scc_error_handler':
drivers/ata/pata_scc.c:908: warning: passing arg 2 of 'ata_bmdma_drive_eh' from incompatible pointer type
drivers/ata/pata_scc.c:908: warning: passing arg 3 of 'ata_bmdma_drive_eh' from incompatible pointer type
drivers/ata/pata_scc.c:908: warning: passing arg 5 of 'ata_bmdma_drive_eh' from incompatible pointer type
make[2]: *** [drivers/ata/pata_scc.o] Error 1

Signed-off-by: Satyam Sharma <satyam@...radead.org>
Cc: Alan Cox <alan@...hat.com>
Cc: Mel Gorman <mel@...net.ie>

---

Andrew, this includes (supercedes) the previous two ones from Mel / Alan.

 drivers/ata/pata_scc.c |   21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff -ruNp a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
--- a/drivers/ata/pata_scc.c	2007-09-22 06:26:37.000000000 +0530
+++ b/drivers/ata/pata_scc.c	2007-09-22 08:04:42.000000000 +0530
@@ -594,16 +594,17 @@ static unsigned int scc_bus_softreset(st
  *	Note: Original code is ata_std_softreset().
  */
 
-static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
-                              unsigned long deadline)
+static int scc_std_softreset(struct ata_link *link, unsigned int *classes,
+                             unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	unsigned int devmask = 0, err_mask;
 	u8 err;
 
 	DPRINTK("ENTER\n");
 
-	if (ata_link_offline(&ap->link)) {
+	if (ata_link_offline(link)) {
 		classes[0] = ATA_DEV_NONE;
 		goto out;
 	}
@@ -692,7 +693,7 @@ static void scc_bmdma_stop (struct ata_q
 			printk(KERN_WARNING "%s: Internal Bus Error\n", DRV_NAME);
 			out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMSINT);
 			/* TBD: SW reset */
-			scc_std_softreset(ap, &classes, deadline);
+			scc_std_softreset(&ap->link, &classes, deadline);
 			continue;
 		}
 
@@ -731,7 +732,7 @@ static u8 scc_bmdma_status (struct ata_p
 	void __iomem *mmio = ap->ioaddr.bmdma_addr;
 	u8 host_stat = in_be32(mmio + SCC_DMA_STATUS);
 	u32 int_status = in_be32(mmio + SCC_DMA_INTST);
-	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	static int retry = 0;
 
 	/* return if IOS_SS is cleared */
@@ -860,10 +861,10 @@ static void scc_bmdma_freeze (struct ata
  *	@deadline: deadline jiffies for the operation
  */
 
-static int scc_pata_prereset(struct ata_port *ap, unsigned long deadline)
+static int scc_pata_prereset(struct ata_link *link, unsigned long deadline)
 {
-	ap->cbl = ATA_CBL_PATA80;
-	return ata_std_prereset(ap, deadline);
+	link->ap->cbl = ATA_CBL_PATA80;
+	return ata_std_prereset(link, deadline);
 }
 
 /**
@@ -874,8 +875,10 @@ static int scc_pata_prereset(struct ata_
  *	Note: Original code is ata_std_postreset().
  */
 
-static void scc_std_postreset (struct ata_port *ap, unsigned int *classes)
+static void scc_std_postreset(struct ata_link *link, unsigned int *classes)
 {
+	struct ata_port *ap = link->ap;
+
 	DPRINTK("ENTER\n");
 
 	/* is double-select really necessary? */
-
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